How to Choose a Pillow: Shape, Size and Cover Care

A practical guide to choosing a pillow, covering dimension comparisons, component care labels, height adjustments, and return terms.

Two pale-blue and white Derila Ergo contour pillows against a beige upholstered headboard.
Seller photograph, Derila. The picture shows two pillows; pack quantity depends on the offer you select.

Verdict: Start with what you like about your current pillow: its height, shape and feel. Use those preferences to compare listed dimensions, check whether you want adjustable fill and look for care instructions that fit your routine. A removable washable cover is a useful detail to consider.

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Who should buy

  • You want to compare pillow shape and dimensions
  • You want cover-care instructions that suit your routine
  • You want to compare a contoured pillow with your current bedding

Consider another option if

  • You are choosing a specialist travel or decorative cushion
Not sure yet? Try our tools: Set your budget and get a lineup

Five practical steps for selecting a pillow

When evaluating pillows online, focus on measurable product specifications and practical order details:

  1. Note personal baseline preferences: Measure the length, width, and height of your current pillow. Note whether you prefer a higher or lower profile, and record how your current pillow feels as a comparison reference.
  2. Compare listed dimensions: Compare your baseline against seller-published measurements and your existing pillowcases. Dimensions are comparison aids rather than a prescription or guarantee of personal comfort.
  3. Check for height adjustment: Verify whether a listing confirms adjustable loft, such as removable foam layers or shredded fill. If height adjustment matters to you, confirm the model supports it before ordering.
  4. Identify component care labels: Check whether care instructions apply to the outer textile cover, an inner liner, or the foam insert itself. Washing instructions for outer covers cannot be assumed to apply to interior foam cores.
  5. Review order details and return terms: Verify pack quantities, item subtotals, selected extras, and return policies before completing an order.

Dimensions, loft, and foam expansion

Loft means height; firmness means resistance to compression. Two pillows with the same advertised height can feel different under your head. Compare them on the mattress you use, rather than treating a fixed inch range as a prescription.

Your starting questions are simple: Do you usually sleep on your side, back or stomach? Does your current pillow feel too high, too low or just uncomfortable in shape? Does your shoulder sink into the mattress? These details help you compare designs without assuming that one sleeping-position label fits everyone.

If you want…Look for…
To change the heightExplicitly removable fill or layers in the exact model
A consistent shaped outlineA molded contour whose center and sides you can compare
A pillow you can reshapeA construction described as moldable, with suitable care instructions
Easy wash-day careClear instructions for the cover and the filling separately

For example, the Derila Ergo guide lists 54 x 36 x 12 cm and 6 to 8 hours of expansion after unpacking. Those are product dimensions and setup instructions. They do not establish compressed sleeping height, personal comfort or adjustable fill.

Care, hygiene, and maintenance

Keeping a pillow fresh requires adhering to proper laundry guidelines:

  • Removable covers: Look for pillows with zippered outer covers that provide specific washing instructions.
  • Foam core care: Cleaning rules for foam cores vary by manufacturer. Always inspect the product care label upon receipt or consult the seller rather than assuming the insert is washable.

Compare the options

For a butterfly-shaped memory foam option, our Derila Ergo review brings together its published dimensions, cover-care instructions and available packs. If height adjustment is essential to you, confirm that feature with the seller before choosing a model.

About this guide

Last updated

Research based on published specifications, without hands-on testing. How we choose

Frequently asked questions

How should you use pillow measurements when shopping?

Measure the height, length, and width of your existing pillow to create a baseline. Compare those measurements against listed product dimensions and your pillowcases. Dimensions provide comparison data rather than proof of personal comfort.

What should you check if considering a contoured pillow?

Check the listed dimensions of the contour sections and verify whether the listing confirms height adjustment. Compare published measurements to your current pillow and bedding before ordering.

How should you verify expansion times for compressed pillows?

Consult the manufacturer user guide for your specific model. For example, the Derila Ergo user guide lists an expansion period of 6 to 8 hours after unpacking, but expansion specifications vary across different products and brands.

How should you handle pillow cleaning and care labels?

Inspect the product care label to determine which component is covered. Outer textile covers may allow machine washing, while inner foam inserts often have distinct care restrictions. Never assume cover washing rules apply to the interior insert.