A small double mattress is a compact 4 ft–wide bed (typically 120 x 190 cm) designed to give more room than a single without taking up as much space as a standard double.

What is a small double mattress?

  • A small double mattress generally measures 120 x 190 cm , sitting between a single and a standard double in width and length.
  • It is marketed under names like “small double”, “three‑quarter size”, or simply “4 ft mattress” in many UK and EU stores.

Who a small double suits

  • Ideal for solo sleepers who like to stretch out but have a relatively small bedroom, such as box rooms, loft rooms, or studio flats.
  • Can work for smaller or occasional-use couples who need to save floor space in compact apartments or guest rooms, though larger couples may find it cramped.

Common types and feel

  • Small double mattresses come in memory foam, pocket-sprung, hybrid, latex, and open-coil options, with a similar range of firmness levels as standard sizes.
  • Hybrids (foam plus springs) are popular because they balance support, pressure relief, and motion isolation, which helps if two people occasionally share the bed.

Space and room planning

  • A small double is often recommended where a single feels too small but a full double would restrict walking space, storage, or door clearance.
  • Families use them for growing kids or teens and for multi‑use rooms, since they can be paired with space‑saving frames, under‑bed storage, or ottoman bases.

Quick buying pointers

  • Check dimensions of the room, doors, and stairs, and leave at least 50–60 cm walking space around key sides of the bed.
  • Match the mattress type to the sleeper: softer for lighter side sleepers, medium to firm for back or stomach sleepers, and prioritize motion isolation if the bed will sometimes be shared.

Information gathered from public forums or data available on the internet and portrayed here.