Your whole bed, with the gaps made visible.

Keep the components that work. Check dimensions, protection, optional toppers and base support together without body or health questions.

Your measurements stay in this tab. Want to come back later? Choose “Save on this device” when you’re ready.

Your existing bed, layer by layer

Where are you shopping?Measurement units

Measure the area to cover

Width (in)Length (in)

Finished stack height (including topper) (in)I measured these dimensions; they are not just a size label.

Where will the protector go?I need a fully zipped, six-sided encasementBase typeMattress arrangementInclude an optional topper comparison

Material exclusions (optional)

Exclude latex

Incomplete material lists remain unverified. Do not use this tool as allergy certification.

Movement and manufacturer checks

Movement neededFitted sheet / protector arrangementExact mattress/base approval

Slat and support checks

Actual gap between slats (in)Manufacturer maximum slat gap (in)I checked load, slat, center-support and attachment requirements in both manuals.

Two base sections do not necessarily mean independent movement. Split-head and fully split mattresses require different fitted coverings. For two sides with different heights, run this check twice.

Pocket depth versus mattress-fit range

Measure the width, length and finished height of everything the covering must enclose. If a protector sits below the topper, its covered height differs from the sheet’s. A fitted protector is not a six-sided zipped encasement.

Worked example: a 13-inch mattress plus 2-inch topper measures 15 inches before any measurable added height. If the finished stack measures 15.5 inches, use 15.5 directly. Brooklinen’s Classic Percale size guide gives a 16-inch mattress-fit maximum: 15.5 is below it. Choosing a 1-inch personal margin would exceed the remaining half inch, but does not make the manufacturer rating fail.

Do not assume a universal half-inch protector allowance or two-inch extra pocket rule. Avocado’s standard protector lists a 15-inch product profile but a 6–16 inch mattress-fit range. Construction and stretch explain why a product dimension and a fit rating are different facts.

Measure at several corners without pressing down. Use the tallest measurement. Illustration is not to scale.

Before a purchase, recheck the exact model, size and pocket version. Confirm care instructions and the actual seller’s return terms, including opened bedding. Direct-brand terms do not automatically apply to another retailer.

See the manufacturer dimensions and fit ranges →

Read the compatibility methodology · Report a specification correction