Mattress Depth & Bed Compatibility

In this guide from The Sleep Shop, we keep it simple and practical so you can shop with confidence.

In this guide:

Why depth matters

Deeper isn’t always better—support quality and materials matter more. Depth impacts sheet fit and edge feel.

Follow manufacturer limits for maximum height/weight and check guardrail clearances on bunks.

Heavier sleepers or those wanting plusher cushioning without losing support.

Are extra-deep sheets necessary?
For mattresses ~30cm+, extra-deep fitted sheets prevent pull-up at the corners.

Does a thicker mattress last longer?
Not automatically—material quality is the key driver of durability.