Sheets Measuring Guide (Fitted & Flat)
This sheets measuring guide covers both fitted and flat sheets — including mattress depth and topper height — so you can measure in minutes and order with confidence. Want us to confirm sizing and provide a price calculation? Send your mattress measurements and include your country and postal code.
What you’ll need
• Measuring tape
• Notes app
• Your mattress measurements
• Mattress topper measurements (if you use one)
Before you measure
• Measure the mattress, not an old sheet.
• If you use a topper, include it in the depth measurement.
• Measure in centimeters or inches — just be consistent.
Measure width
Measure mattress width from edge to edge.
Measure length
Measure mattress length from top to bottom.
Measure depth (important for fitted sheets)
Measure mattress depth/height (thickness from top surface to bottom).
If you have a topper, measure the total height mattress + topper.
Choose your sheet type
• Fitted sheet: needs width + length + depth
• Flat sheet: needs mattress size + your preferred overhang/drop
Flat sheet — choose your preferred overhang
Decide how much you want the sheet to hang over the sides and foot of the bed (more overhang = more tuck-in room and a softer drape).
Common mistakes
• Forgetting mattress depth for fitted sheets
• Not including a topper in the depth measurement
• Choosing a flat sheet without deciding how much overhang you want
• Mixing inches and centimeters
Save this guide summary as a PDF in your inbox — so it won’t get lost and you can use it whenever you need it.
New subscribers also receive a little gift.
Sheets Measuring Guide (Fitted & Flat) — Send us your measurements
Message us your mattress measurements — we’ll confirm the right sheet size and provide a price calculation for fitted sheets, flat sheets, or a set.
Please include:
• Mattress width × length × depth/height
• Topper height (if used)
• Sheet type: fitted / flat / both
• For flat sheets: your preferred overhang/drop (how much you want it to hang)
• Quantity (1 or set)
• Country and postal code (for delivery estimate)
