How to Measure for a Window Seat Cushion

Ordering a made-to-measure window seat cushion is the best way to achieve a seamless, tailored finish. But accurate measurements are essential.

A difference of even one centimetre can affect the final fit. In this guide, we explain exactly how to measure your space correctly, whether you have a simple rectangular seat or a more complex bay window.

Why Accurate Measurements Matter

Unlike ready-made cushions, bespoke cushions are crafted to your specific dimensions. This ensures:

• A precise, gap-free fit
• A more refined and built-in appearance
• Better long-term support and comfort

Taking careful measurements ensures your finished cushion looks intentional rather than improvised.

Tools You Will Need

Before you begin, gather:

• A metal tape measure
• A notepad or phone for recording dimensions
• A straight edge or book
• A pencil

Always measure in centimetres for consistency.

How to Measure a Standard Rectangular Window Seat

Most window seats are rectangular. Follow these steps:

1. Measure the Width

Measure from wall to wall across the front edge of the seating area.

Take the measurement in two places, front and back, to check for wall irregularities. Use the smaller measurement if they differ slightly.

2. Measure the Depth

Measure from the back wall to the front edge of the seat base.

Again, take two measurements. Walls are not always perfectly straight.

3. Measure the Thickness You Prefer

Common cushion depths are 5 cm, 7 cm or 10 cm. Thicker cushions provide more comfort but slightly raise the seating height.

Measuring a Bay Window Cushion

Bay windows require extra care.

For angled bays:

• Measure each back section separately.
• Measure the front edge.
• Note the angles if visible.

If the shape is irregular or curved, it is often best to create a paper or cardboard template.

Common Measuring Mistakes to Avoid

• Measuring skirting boards instead of the seating base
• Forgetting that walls are rarely perfectly straight
• Guessing rather than measuring twice
• Confusing millimetres and centimetres
  
  

Always double-check every measurement before ordering.

What If My Space Is Not Perfectly Straight?

Many homes have slight irregularities. If your space is unusual, you can:

• Provide detailed notes with your order
• Contact us for guidance
• Provide a simple template if required

Our made-to-measure cushions are designed to accommodate real homes, not showroom perfection.

Ready to Create Your Perfect Fit?

Once you have your measurements, you can choose your preferred size band, cushion depth and fabric to create a bespoke piece tailored to your space.

Explore our made-to-measure bench and window seat cushions and design yours today.