How To Measure A Sofa Before Ordering A Fitted Cover

Ordering a fitted cover for your sofa requires precise measurements to ensure a snug, professional look. This guide provides a step-by-step process for measuring every critical dimension of your sofa, from overall width to individual cushion thickness, helping you avoid the common pitfalls of a poor fit.

Fast Answer

Use a flexible measuring tape to measure the widest, deepest, and tallest points of the sofa, including arms and back.
Always compare your measurements against the specific sizing chart or diagram provided by the cover's manufacturer before ordering.

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Step-by-step Guide format

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Before You Start

A flexible measuring tape (metal or fabric) is essential for accurately capturing curves and contours.
A notepad and pen, or a digital device, to clearly record each measurement as you take it.
Clear the area around the sofa to ensure you can move freely and extend the tape without obstruction.
An assistant can be very helpful for holding the tape steady across long spans like the sofa's width.

Check first: The most common reason for a poorly fitting sofa cover is inaccurate measurements. Always measure twice and record your numbers carefully. Do not estimate or round your measurements, as even a small error can result in a cover that is too tight or excessively baggy.

Step-by-Step Instructions

Measure Overall Width and Height

First, establish the overall dimensions of your sofa, as these are the most critical numbers for determining the base size of the cover. Take your flexible measuring tape and extend it from the outermost point of one armrest, across the entire front of the sofa, to the outermost point of the opposite armrest. This is your total width. Be sure the tape is straight and taut, not dipping in the middle. Next, measure the total height. Place one end of the tape on the floor and extend it vertically to the highest point on the sofa's back frame, not just the top of the cushions. Record both numbers clearly. A practical check is to perform each of these two measurements twice. If you get different numbers, it likely means the tape slipped or wasn't straight, so take a third measurement for accuracy. This check matters because if the width is too short, the cover won't even go on, and if the height is wrong, a skirted cover will either drag on the floor or sit too high.

Tip: When measuring width, ensure you are capturing the absolute widest point, which might be the curve of the armrests, not the base.

Determine Overall and Seat Depth

Now, focus on the sofa's depth, which dictates how the cover will fit from front to back. For the overall depth, place the end of your measuring tape at the very front edge of the sofa's frame or cushions, whichever extends further. Extend the tape in a straight line to the very back of the sofa, ensuring it is parallel to the floor. This measurement captures the entire footprint. After recording this, measure the seat depth specifically. This is the distance from the front edge of the seat cushion to where the seat cushion meets the sofa's back. For your practical check, sit on the sofa normally. Your knees should be near the front edge you measured. If the seat depth seems unusually long or short compared to how it feels, you may have measured at an angle. This check is important because an incorrect overall depth measurement can result in a cover that is either too baggy at the back or too shallow to tuck in securely at the front, causing it to constantly ride up.

Tip: For an L-shaped sectional, measure the depth of each section separately from its back to the front of its respective cushion.

Measure Arm Dimensions Carefully

The arms of a sofa are often a point of poor fit, so precise measurements here are key. Start by measuring the width of one armrest. Place your tape on the inside edge of the arm, where it meets the seat cushion, and measure across to the outermost edge. Next, determine the arm height by measuring from the floor up to the highest point of the armrest. Finally, measure the arm depth by running the tape from the very front of the armrest to the back where it joins the main body of the sofa. Repeat these three measurements on the other arm to ensure they are symmetrical. A useful check is to compare the arm width to your hand span; it helps visualize if the number is reasonable. This matters because many covers have specifically shaped sections for the arms, and if your measurements are off, the seams will not align properly, creating a sloppy and unprofessional look while causing strain on the fabric.

Tip: If your sofa has curved or rounded arms, use the flexible tape to follow the curve's surface for the most accurate arm depth measurement.

Measure the Back Cushion Height

To ensure the cover fits snugly over the back of the sofa without bunching or being overstretched, you need to measure the height of the backrest from the seat. Do not measure from the floor for this step. Instead, place the end of your measuring tape on the top surface of the seat cushions, right where they press against the sofa's back. Extend the tape vertically up to the very top of the sofa's frame. If you have loose back pillows, remove them first and measure the solid frame behind them. If the back pillows are attached, measure over them but try to follow the contour of the frame underneath as much as possible. As a practical check, compare this measurement to the sofa's total height you took earlier; the backrest height should be significantly less. This check matters because this dimension determines how much fabric is allocated for the back portion of the cover. An inaccurate number can lead to a cover that sags over the back or pulls up from the seat cushions.

Tip: For sofas with multiple back height levels, such as a camelback sofa, always measure to the absolute highest point of the back frame.

Measure Individual Seat Cushions

If your chosen cover has separate pockets for the seat cushions, or if you simply want the best possible fit, you must measure each seat cushion individually. Remove one cushion from the sofa and place it on a flat surface. Measure its width from side to side at the widest point. Next, measure its depth from the front edge to the back edge. Finally, measure its thickness or height by placing it on the floor and measuring from the floor to its top surface. Be sure to measure the cushion itself, not the empty space on the sofa frame. Record these three dimensions, and then repeat the process for every seat cushion, as they can sometimes vary slightly in size. A simple check is to stack the cushions; if they are not perfectly flush, they have different dimensions. This is important because a generic 'seat size' won't account for the unique shape and thickness of your cushions, leading to a loose, wrinkled appearance or a fit so tight it damages the cushion foam over time.

Tip: For T-shaped cushions, measure the width at the widest point in the front 'T' section and also the width of the back section.

Account for Sofa Skirt or Legs

The final critical measurements relate to the base of your sofa, especially if you are considering a cover with a skirt. First, determine the skirt height or leg height. Measure the vertical distance from the floor to the very bottom edge of the main sofa frame or upholstery. Do not measure to the bottom of a cushion that hangs over the edge. This tells you how long the cover's skirt needs to be to either hide the legs or stop just above them. After that, measure the circumference of one of the sofa's legs if the cover has specific openings or ties for them. As a practical check, look under the sofa to see exactly where the solid frame begins; this is your measurement point. This check is crucial because a cover with a skirt that is too long will bunch up and collect dust on the floor, while one that is too short will awkwardly expose the legs you might be trying to conceal, defeating the purpose of a skirted style.

Tip: When measuring for a skirt, decide if you want it to touch the floor or hover slightly above, and adjust your acceptable measurement range accordingly.

Quick Reference

Situation	Action	Why it helps
My sofa has large, rolled arms.	Measure the circumference of the arm's front face by looping the flexible tape measure completely around it at its thickest point.	Simply measuring the width will not account for the volume of a rolled arm, and the cover's arm section will be too tight to fit over it properly.
My sofa has a chaise lounge.	Measure the chaise section as a separate piece: its width, its total length from the main sofa back to its front edge, and its height.	Most covers for these sofas come in two or more pieces, and you will need the specific dimensions for the chaise to ensure you order the correct configuration.
My sofa back is low or curved.	Use a flexible tape to measure the outside perimeter, starting from one bottom corner, up and over the back, and down to the other bottom corner.	Some cover guides require this 'over the top' measurement to ensure the cover has enough material to wrap around the entire body of the sofa without pulling.

Common Issues

Measurements fall between two sizes.: Always choose the larger size. A slightly loose cover can be tucked in for a neat appearance, whereas a cover that is too small simply will not fit and may tear if forced.
The cover fits the frame but not the cushions.: This often happens with T-cushions or oversized cushions. Re-measure your cushions' width, depth, and height carefully and look for covers specifically designed for these shapes.
The delivered cover seems too wrinkled.: This may not be a measurement issue. Many covers require extensive tucking into crevices. Use a spatula or wooden spoon to push excess fabric deep into the seams around the seat and arms for a tighter fit.

Advanced Tips

Take photos of your sofa from the front, back, and side. Then, sketch a simple diagram and write your measurements directly on it to visualize the numbers.
Check the cover's material. Fabrics with more stretch, like those with a higher spandex percentage, offer greater flexibility if your measurements are slightly off.
If your sofa has any unique features like integrated tables or reclining mechanisms, measure them separately and check if the cover is designed to accommodate them.

Final Checklist

Have you measured the absolute widest point, including arms?
Did you double-check your numbers against the seller's sizing guide?
Have you measured cushion width, depth, and thickness separately?
Are your recorded measurements clear and labeled correctly (e.g., W, H, D)?

FAQ

Should I remove cushions before I measure?

Yes, for the most accurate results, remove all seat and back cushions. Measure the sofa frame's dimensions first, including seat depth and back height. Then, measure the cushions separately, especially their thickness, to ensure a proper fit for all components.

What if my sofa is a sectional?

Treat each section of the sectional as a separate piece of furniture. Measure the width, depth, and height of the main sofa part, the corner piece, and the chaise individually. Refer to the cover manufacturer's guide, which will show how to combine these measurements to select the correct set.

Do I need to add extra for tucking?

No, do not add extra length to your measurements. Cover manufacturers have already factored in the necessary material for tucking and securing the cover into their sizing charts. Providing your sofa's exact dimensions is the most reliable way to get a well-fitting product.