Buying Guide

How to Choose a Bed Frame and Mattress Size

Interior of the kin. store, photographed by Tom Bird.

A bed is larger than its mattress. The frame, headboard and surrounding clearance determine whether it fits the room, while the mattress specification determines whether the two components are compatible. Check both before ordering.

Does the bed size refer to the mattress or frame?

Names such as double or king usually describe a mattress category, not the bed’s complete outer dimensions. Frames can extend beyond the mattress at the sides, foot or headboard. Always use the product drawing and stated overall width and length.

Will every mattress fit every frame?

No. UK and European nominal sizes can differ, and designs may require a specific mattress dimension or type. Match the manufacturer’s internal sleeping dimensions exactly and check any guidance on mattress depth, slats and support.

Mattress depth affects more than fit. A very deep mattress can hide part of a low headboard or make the finished sleeping height unexpectedly high; a shallow one may leave an intended gap. Check how far the mattress sits within the frame as well as its overall depth.

How much room should you leave around a bed?

Allow space to approach the bed, open nearby doors and drawers and change the bedding. In a compact room, test the full frame outline on the floor and include bedside tables rather than measuring the mattress alone.

Walk the route in the dark and consider which side each person normally uses. A narrow gap may look acceptable on plan but become frustrating when carrying laundry or opening a wardrobe. Preserve the clearest route to the door rather than centring the bed automatically.

How does the headboard affect the fit?

A headboard can add width, depth and visual height. Check skirting boards, sockets, wall lights and sloping ceilings. If the bed sits beneath a window, confirm that the headboard will not obstruct it.

What should you check beneath the bed?

Measure floor clearance if you expect to store items underneath. Check the position of central legs and supports, and whether the room’s flooring allows the frame to stand level. Never remove structural components to create more storage.

Also check ventilation requirements around the mattress and base. Filling every available gap with solid boxes may restrict airflow or make cleaning difficult. If under-bed storage is essential, choose it as part of the bed decision rather than improvising afterwards.

Will it reach the bedroom?

Confirm package dimensions, stair turns, landings and doorways. Understand which parts arrive dismantled and whether the headboard or longest rails can pass through the access route.

Measure lifts and communal entrances where relevant, and check whether assembly is included or requires clear floor space and particular tools. Protect the route before delivery; long rails can pass a doorway yet still fail at the following turn.

Choosing a bed

Match the exact mattress and frame dimensions, then plan the outer footprint, headboard, access and usable space around it.

Choose the right foundation for the room. Explore our beds, or contact us to check dimensions and mattress compatibility.

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