Mattress Buying Guide

The right mattress should suit the way you sleep, the space you have and the feel you enjoy. Use this guide to narrow down your options before comparing individual models.

Start with your sleeping position

If you usually sleep on your side, look for enough cushioning around your shoulders and hips without feeling unsupported. Back sleepers may prefer a balance of cushioning and support, while front sleepers may find a surface that limits excessive sinking more comfortable. If you change position during the night, consider how easily you can turn over.

Choose a feel, not just a firmness label

Soft, medium and firm describe how a mattress feels, but these labels can vary between brands and models. Your body weight, preferred sleeping position and base can also affect that feel. A firmer mattress is not automatically more supportive, and a softer mattress is not automatically less supportive.

If you experience back discomfort, avoid choosing on firmness alone. No mattress can promise to treat a medical condition. For persistent pain or a diagnosed condition, ask a qualified healthcare professional for advice.

Understand the main mattress types

Pocket sprung

Pocket springs sit in individual fabric pockets and respond to pressure across the mattress. Compare the complete construction, including the comfort layers and edge reinforcement, rather than choosing on spring count alone.

Memory foam

Memory foam contours around the body and can offer a close, cushioned feel. How deeply you sink in and how easily you can move will depend on the model. If you dislike feeling enclosed, compare it with a more responsive design.

Hybrid

Hybrid mattresses combine springs with foam or other comfort materials. The feel depends on the layers used, so the word hybrid alone does not tell you how firm, cool or supportive a mattress will be.

Other fillings and constructions

Mattresses may include materials such as wool, cotton or latex. Read the specific product description to understand what is included and how the mattress should be cared for. These descriptions explain general mattress types, not availability within our range.

Look beyond the centre of the mattress

If you sit on the edge to get dressed or sleep close to the side, edge support is worth comparing. Check whether the model describes a reinforced border. For couples, consider movement transfer as well as comfort: a mattress that feels good for one person may feel different when shared.

If you tend to sleep warm

Consider the mattress construction alongside your duvet, protector, sheets and room temperature. Breathable materials and airflow may help, but cooling descriptions are not a guarantee that a mattress will feel cool to everyone.

Measure before choosing a size

Common UK mattress dimensions are:

Single: 90 × 190 cm
Small double: 120 × 190 cm
Double: 135 × 190 cm
King: 150 × 200 cm
Super king: 180 × 200 cm

Check the dimensions shown for the specific product and measure the mattress space inside your bed frame. Do not rely on a size name alone, particularly for imported frames. Allow space to walk around the bed, open drawers and move the mattress through doors, stairs and tight turns.

Check your base is compatible

Before ordering, check the mattress manufacturer's requirements for the base type, condition and any maximum slat spacing. There is no single spacing rule that applies to every mattress. Do not assume a mattress is suitable for an adjustable base unless the manufacturer confirms it.

Inspect your existing base for damaged slats, uneven support or sagging. A mattress and base work together, so a worn or unsuitable base can affect comfort and performance.

Compare the practical details

Before buying, confirm the exact model, size, depth, care instructions and guarantee terms. Check whether it needs rotating or turning, and whether its depth will suit your fitted sheets and bed frame.

For delivery information and current return and cancellation terms, read our Delivery & Returns page. Confirm any assembly, room placement or old-mattress removal requirements with us before ordering rather than assuming these are included.

For guarantee information, read our Guarantees & Warranties page alongside the terms for your chosen product. Do not assume a comfort trial is included unless it is expressly offered.