How to Measure for Custom Bedding: Sheets, Duvet Covers and Comforters

Quick answer: There is no single “custom bedding size.” Measure each item that the bedding must fit, record the unit, then state the finished dimensions you want. A mattress measurement alone cannot specify a duvet cover or pillowcase.

What should you measure before ordering custom bedding?

Measure the mattress width, length and full depth, including any topper that will stay on the bed. For a fitted sheet, specify the required pocket depth and the elastic construction you expect. For a flat sheet, decide how far you want it to extend beyond the mattress. For a duvet cover, measure the actual insert rather than relying only on its Queen or King label. For pillowcases, measure the pillow and state the desired closure.

Is mattress size the same as finished sheet size?

No. Mattress size describes the object being covered; finished sheet size describes the sewn product. Depth, hem, elastic and intended drape affect the specification. Record both sets of measurements in the same unit and confirm the proposed finished dimensions in writing. If a drawing or sample is needed, ask whether it is available for the order. This is especially useful when the destination market uses a different naming convention.

How should you describe a custom duvet cover?

Start with the insert's measured width and length. Then specify the desired finished cover size, opening position, closure type and whether internal ties are needed. Do not assume a named bed size identifies the insert size. Our Queen versus King comforter guide explains why labels need a measurement check.

What should be included in a purchase-ready size brief?

Send a separate line for every SKU: item type, proposed finished width × length, unit, mattress or insert dimensions, fabric and filling where relevant, closure, color, quantity, packing and destination market. Mark each number as body measurement or finished product measurement. Discuss allowable tolerance and whether a sample can be arranged before treating either as an agreed order term.

The SleepBella size guide is a starting point.

What can you copy into a size inquiry?

Use one line per item or SKU. Replace the prompts with your actual measurements; do not treat this example as a standard size or an agreed production tolerance.

• Item and intended use: [fitted sheet / flat sheet / duvet cover / comforter / pillowcase]
• Object to fit and its measurements: [mattress / insert / pillow; width × length × depth where relevant; unit]
• Requested finished product measurements: [width × length; pocket depth or drop where relevant; unit]
• Construction and material preferences: [fabric, fill if applicable, closure, elastic or internal ties]
• Order details: [quantity per variation, destination market, packaging needs and target delivery window]
• Items to confirm in writing: [available construction, measurement tolerance, sample option and current quotation]

Planning a bedding order? Send SleepBella your measurements and product brief. We can discuss the requested specification and confirm what is available for your order.