How to Measure a Sectional Sofa Cover

Updating your space with a sofa cover is one of the easiest ways to give your home a fresh feel. It shields your couch from pets and little ones, brings extra warmth, and instantly makes the whole room look cleaner and more put-together. But to get that smooth, custom-looking fit, the key is choosing the right size.

A cover that’s too small will pop out of place; one that’s too big will slip. Accurate measurements make all the difference.

At Coverfect, we make sizing simple. This guide walks you through how to measure your sofa in a few clear, stress-free steps—no guessing, no complicated charts. And if you’d like help, just send us a photo and your measurements, and we’ll suggest the size that fits best.

Ready to find your perfect fit? Let’s begin.

1. What You Need Before You Start

Before measuring, prepare:

  • A soft measuring tape
  • A phone/notepad
  • A helper for larger or L-shaped sofas
  • (Optional) A straight ruler and a photo of your sofa

These basics help ensure accurate, first-try sizing.

2. How to Measure Your Sofa

Step 1: Measure the Back Cover

For the back cover size, we accommodate the following dimensions:

  • Length: 31.5 – 39.4 inches
  • Width: 19.7 – 25.6 inches
  • Height: 2 – 7.9 inches

The back cover is designed to be slightly larger than the seat cover so it can fully wrap the backrest, allowing for different cushion thicknesses and a variety of sofa styles.

Step 2: Measure the Seat Cover

Our seat covers are crafted to fit cushions within these measurements:

  • Length: 25.6 – 33.5 inches.
  • Width: 25.6 – 33.5 inches
  • Height: 2 – 7.9 inches

The length and width allow the cover to wrap the entire seating surface, while the height range accommodates varying cushion thicknesses for a secure, seamless fit.

Step 3: Measure the Chaise Cover

For sofas with a chaise extension, our chaise covers are designed to fit within the following dimensions:

  • Length: 63 – 74.8 inches
  • Width: 37.4 – 47.2 inches
  • Height: 2 – 7.9 inches

Because the chaise extends outward, this cover is intentionally larger to ensure it wraps the entire section comfortably and securely.

3. Common Measuring Mistakes to Avoid

Here are the errors that most often lead to choosing the wrong size:

  • Measuring only the cushion—not the whole sofa
  • Measuring from the inside of armrests instead of the outside
  • Forgetting to measure back cushions
  • Misidentifying the left/right chaise
  • Rounding numbers incorrectly
  • Estimating instead of using a tape measure.

If your sofa has a unique shape, large armrests, or a custom layout, we’re here to help. Just send us a clear photo along with your main measurements (and chaise length if you have one), and our team will quickly recommend the best size for you.

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