By Lauren HollandGetting the right size when shopping online saves time and frustration. Whether you are buying clothing, furniture, bedding, or appliances, a few preparation steps can help you avoid returns and disappointment. This guide covers practical ways to measure yourself and your space, interpret size charts, and use product information to make confident choices. For a broader look at frequent shopping pitfalls, see common buying mistakes and how to avoid them.
Measure Before You Shop
The most reliable way to choose the correct size is to measure before you place an order. Online size guides and product dimensions are only useful if you have your own numbers to compare them against. Keep a basic set of tools handy so you can take accurate measurements at home.
For clothing, you need a flexible measuring tape. If you do not already own one, consider picking up a set of measuring tapes that includes both a soft tape for body measurements and a rigid tape for home goods. Measure your bust or chest, waist, hips, inseam, and torso length for tops and bottoms. For fitted garments such as blazers or dresses, also measure your shoulder width and arm length. Always measure over undergarments or thin clothing, not over bulky layers. Stand straight with the tape snug but not tight.
For furniture, appliances, and home decor, use a rigid tape measure or a laser distance measurer. Measure the width, depth, and height of the intended space. Account for baseboards, molding, and any obstructions. For large items such as sofas or refrigerators, also measure doorways, hallways, stairwells, and elevator openings along the delivery path. Write down every measurement and keep them in a notes app or on paper near your shopping device.
For bedding and linens, measure your mattress thickness as well as its length and width. Mattress depths vary widely, so a fitted sheet that fits a standard mattress may not work on a pillow-top or extra-thick mattress. For curtains, measure the width of your window frame and the height from the curtain rod to where you want the hem to fall.
For rugs, measure the floor area you want to cover and also consider the furniture layout. A rug that is too small can make a room feel disjointed, while one that is too large may overwhelm the space. Use painter’s tape to outline the rug dimensions on the floor before you shop.
Reading Size Charts
Every online store should provide a size chart for the product you are considering. Do not rely solely on the generic S, M, L, XL labels. Size standards vary between brands and even between different product lines from the same brand. A size chart translates those letters into actual body measurements or item dimensions.
When you open a size chart, locate the measurement that corresponds to your own. For clothing, look for chest, waist, and hip measurements in inches or centimeters. Compare your numbers to the chart and choose the size that matches your largest measurement. For example, if your chest fits a medium but your waist fits a large, choose the large. You can always have a garment taken in, but you cannot add fabric to something that is too small.
For furniture and home goods, the size chart is often listed as product dimensions in the description. Look for width, depth, height, and weight capacity. Pay attention to whether the dimensions include packaging. Some items ship with protective materials that add several inches to the footprint, which can matter for delivery through narrow spaces.
For bedding, size charts list the mattress dimensions the sheet set is designed to fit. A queen sheet set is meant for a queen mattress, but if your mattress is thicker than average, look for “deep pocket” or “extra deep pocket” specifications. The same applies to mattress protectors and toppers.
For rugs, size charts show the exact length and width. Common sizes such as 5×8 or 8×10 are nominal, so check the actual dimensions listed. A rug labeled 5×8 may measure 4 feet 10 inches by 7 feet 6 inches, which can affect how it fits under your furniture.
If a product page does not have a size chart, contact the seller before ordering. Many brands also offer sizing guides that explain how to measure for their specific products. Bookmark or screenshot the size chart so you can refer to it when your order arrives.
Using Fit Notes in Reviews
Customer reviews often contain valuable information about how a product fits in real life. Look for reviews that mention sizing specifically. Phrases such as “runs small,” “runs large,” “true to size,” or “order up a size” give you clues that the size chart alone may not tell you. Pay attention to reviews from people who mention their height, weight, or usual size so you can compare to your own build.
For clothing, reviews may note that a garment is snug in the shoulders, loose in the waist, or shorter than expected. For shoes, reviewers often mention whether a style runs narrow or wide. For furniture, reviews may describe whether a sofa sits firm or soft, or whether a table’s height works with standard chairs. For bedding, reviews can tell you if fitted sheets pop off the corners or if a duvet cover is generous enough for a thick comforter.
Sort reviews by most recent or by “most helpful” to find the most relevant fit comments. Some sites allow you to filter reviews by size or body type, which can help you find people with similar measurements. Be cautious about very positive or very negative reviews that lack detail. A review that says “perfect fit” without any context is less useful than one that says “I am 5 feet 6 inches and 150 pounds, and the medium fits comfortably.”
For a deeper understanding of how to evaluate product reviews, read how to read product reviews and spot fake ones. That guide covers how to identify trustworthy feedback and avoid misleading information.
Furniture and Appliances: Doorways and Delivery Paths
Large items such as furniture and appliances require more than just fitting in the room. You also need to get them through your doorways, hallways, stairwells, and any tight corners. Measure every opening along the delivery path, including the front door, interior doors, hallway width, stair width, and landing space at the top of stairs. Write down the narrowest point, because that is the limiting dimension.
For sofas and sectionals, measure the width and height of the item in its assembled state. Many sofas have removable legs or back cushions that reduce the overall height and width for transport. Check the product description for “shipping dimensions” or “disassembled dimensions” to see if the item breaks down into smaller pieces. If the sofa cannot fit through your door, look for a model with a modular design or a narrower profile.
For refrigerators, washers, dryers, and other appliances, measure the width, depth, and height of the space where the appliance will sit. Also measure the door opening of the room where the appliance will be installed. Appliances often require a few inches of clearance on all sides for ventilation and leveling. Check the manufacturer’s installation requirements for minimum clearances.
For large area rugs, consider how you will roll or fold the rug to bring it inside. A rug that is 9 feet by 12 feet may be too large to carry through a standard doorway when rolled. Some rugs come in a tube that is easier to maneuver, but check the shipping dimensions before ordering.
For mattresses, measure the width of your stairwell and the height of the ceiling on the stairs. Many mattresses are shipped in a box and expand once opened, but traditional mattresses may need to be carried up stairs. If you live in a building with a narrow elevator, measure the elevator door and interior dimensions as well.
If you are uncertain about any dimension, contact the seller or delivery service. Some companies offer a “measure your home” service or provide detailed delivery instructions. Never assume an item will fit based on room dimensions alone.
Bedding, Rugs and Curtains
Home textiles come with their own sizing rules that differ from clothing. For bedding, the most common mistake is buying sheets that do not fit the mattress depth. Standard mattress depths range from about 7 to 12 inches, but pillow-top and luxury mattresses can be 14 to 18 inches or more. Look for “deep pocket” sheets if your mattress is thicker than average. Also check the fitted sheet’s pocket depth, which is usually listed in the product description.
For duvets and comforters, measure your bed and decide how much overhang you want on each side. A comforter that is too small will look skimpy, while one that is too large may bunch up on the floor. The same logic applies to quilts and bedspreads. For pillow shams, measure your pillow insert size and compare it to the sham dimensions. A standard sham is designed for a 20 by 26 inch pillow, but some shams are cut larger or smaller.
For rugs, the size you choose affects the entire room’s layout. A common rule of thumb is to leave 18 to 24 inches of bare floor around the rug’s perimeter in a living room or dining room. For a dining room, the rug should extend at least 24 inches beyond the table on all sides so chairs stay on the rug when pulled out. For a bedroom, a rug placed under the bed should extend beyond the sides and foot of the bed by at least 12 to 18 inches. If the rug is too small, it can look like a postage stamp in the middle of the floor.
For curtains, measure the width of your window and multiply by 1.5 to 3 times for fullness. For example, a 36-inch wide window typically needs curtains that are 54 to 108 inches wide total. Also measure the height from the top of the curtain rod to where you want the hem. Curtains that are too short look awkward, while curtains that puddle on the floor can collect dust. Decide whether you want the hem to just touch the floor, hover above it, or puddle slightly, and choose the length accordingly.
For home textiles, read the care label and product notes for shrinkage before you buy. Cotton sheets and curtains can shrink slightly in the first wash, so allow a little extra length if the listing warns about it, and check whether washing an item affects its return eligibility.
Kids Clothing
Children’s clothing sizing is especially tricky because kids grow quickly and size labels vary by brand. The best approach is to measure the child before each purchase rather than relying on age labels. A 5-year-old may wear size 5 in one brand and size 6 in another, depending on the brand’s sizing standards.
Measure the child’s height, chest, waist, and hip. For pants, also measure the inseam. Compare these numbers to the brand’s size chart. Many brands include a height range for each size, which is a useful starting point. If the child is between sizes, choose the larger size for longer wear, especially for items such as coats and pajamas that allow some room to grow.
For shoes, measure the child’s foot length and width. Trace the foot on a piece of paper while the child is standing, then measure from the heel to the longest toe. Compare that measurement to the shoe size chart. Children’s feet grow quickly, so leave about a half-inch of extra space at the toe for growth. If the child wears orthotics or has wide feet, look for brands that offer wide widths.
For school uniforms or special occasion clothing, check the return policy before ordering. Some brands allow exchanges for size but not returns, so you want to be sure you can swap if the fit is wrong. Order one size up if you are unsure, because it is easier to hem or take in than to let out.
For baby and toddler clothing, consider the diaper factor. Bodysuits and one-piece outfits should have enough room for a diaper without being too loose. Snap closures should align comfortably without gaping. For sleepwear, follow safety guidelines for snug fit to reduce fire risk, and check the product description for fit specifications.
Exchanges and Returns for Size
Even with careful measuring, sometimes the size is wrong. Knowing the return and exchange policy before you buy can save you from being stuck with an item that does not fit. Read the seller’s policy for sizing-related returns. Some stores offer free returns or exchanges for size, while others charge a restocking fee or require you to pay return shipping.
For clothing, many retailers allow exchanges for a different size within a certain timeframe. Keep the tags on and do not wash or alter the item until you are sure it fits. Try on clothing in good lighting and move around to check for comfort. If you need to exchange, follow the seller’s instructions for repackaging and shipping. Some stores provide a prepaid return label for size exchanges.
For furniture and large appliances, return policies are often more restrictive. Many sellers require you to inspect the item upon delivery and report any damage or size issues within a short window. Some items are final sale or have a restocking fee that can be substantial. Before ordering, ask the seller about their policy for returns due to size or fit. If you are unsure about a large purchase, consider buying from a retailer with a generous return policy for home goods.
For bedding, rugs, and curtains, check whether the item can be returned after opening the packaging. Some sellers allow returns only if the item is unused and in its original packaging. If you need to test the fit, do so carefully and keep all packaging materials.
For a complete overview of return policies during the holiday season, see the holiday returns guide. That page explains key deadlines and tips for hassle-free returns.
FAQ
What should I do if I am between sizes on a size chart?
Choose the larger size. You can have a garment taken in by a tailor, but you cannot add fabric to something that is too small. For shoes, choose the larger size and use an insole or thicker socks if needed.
How do I measure a doorway for furniture delivery?
Measure the width and height of the door opening, including the door frame. Also measure the width of the hallway and any stairwells along the delivery path. The narrowest point determines whether the item will fit.
Can I return bedding if the fitted sheet does not fit my mattress?
It depends on the seller’s policy. Many retailers allow returns of unused bedding in original packaging. Check the policy before ordering, and consider buying deep pocket sheets if your mattress is thicker than average.
How do I know if a rug will look right in my room?
Use painter’s tape to outline the rug dimensions on your floor. This gives you a visual guide for how much floor space the rug will cover. Also consider the furniture layout and how much bare floor you want around the edges.
What is the best way to measure a child for clothing?
Measure the child’s height, chest, waist, hip, and inseam while they are standing. Use a flexible measuring tape and keep the child still. Compare your numbers to the brand’s size chart rather than relying on age labels.
Choosing the right size when shopping online takes a few extra minutes of preparation, but it saves the hassle of returns and the disappointment of a poor fit. Keep your measurements handy, read size charts carefully, and use customer feedback to guide your decisions. With these strategies, you can shop with confidence and get the right size the first time.
About Lauren Holland
Lauren Holland is part of our editorial team and reviews and edits our holiday shopping calendar guides, checking product details against manufacturer specifications and owner feedback.
