Quick answer

Measure the mattress, not the furniture, and buy a fitted sheet with an elasticated skirt that matches that length, width and depth. For a Snuzpod, that usually means a 40 x 80 cm crib sheet; for a Snuzkot or cot bed, a 70 x 140 cm sheet; and for a Moses basket, the sheet must match the basket's specific mattress. If the sheet is loose enough to bunch, it is the wrong size.

Why mattress size beats brand name

Two Snuzpod mattresses can differ slightly, and Moses baskets vary far more because they are often handmade. A sheet labelled 'Moses basket' may still be too big or too small. The only reliable method is to measure your mattress: length, width and depth. Add a little for the sheet to tuck under, but not so much that the fabric wrinkles. A snug fit keeps the sheet flat and reduces the risk of loose fabric near your baby's face.

  • Measure length and width at the widest point of the mattress.
  • Measure depth from the top surface to the bottom edge.
  • Check whether the sheet has a deep enough skirt to wrap under the mattress.

Snuzpod and crib fitted sheet sizes

Snuzpod bedside cribs typically use a 40 x 80 cm mattress, though always confirm with your specific model. A sheet for this size needs a short skirt because the mattress is thin. If you use a standard cot bed sheet, it will be far too big and will bunch. Look for a sheet described as a crib or bedside crib sheet, and check the listed dimensions rather than relying on the brand name alone.

Snuzkot and cot bed fitted sheet sizes

Snuzkot and most cot beds use a 70 x 140 cm mattress. This is a common size, so you will find many options, including obaby fitted sheets and cuddleco fitted sheets. The key difference is depth: cot bed mattresses are thicker than crib mattresses, so the sheet needs a deeper skirt. A sheet with a shallow skirt may ping off during the night. Check the depth measurement and choose a sheet with a skirt that fully covers the mattress sides.

Moses basket fitted sheets

Moses basket mattresses are often oval or slightly irregular, and sizes vary between makers. Some baskets come with a mattress that is a standard size, but many do not. If you cannot find a sheet that matches exactly, a slightly larger sheet with a deep elasticated skirt can work if it tucks fully underneath and stays flat. Avoid sheets that are too small, as they will not stay on. If the sheet is loose or creates folds, it is not safe for sleep.

Fabric and practical trade-offs

Cotton is breathable and washes well, but it can shrink slightly. Polycotton blends hold their shape and need less ironing, but some parents find them less soft. Jersey knit stretches, which helps with odd-shaped Moses basket mattresses, but it can also stretch out of shape over time. Whichever you choose, buy at least two sheets per sleep space so one can be on the bed while the other is in the wash. Pre-wash new sheets before first use to remove any manufacturing residue and to check for shrinkage.

Decision rules for buying fitted sheets

  • Measure before you buy: Use a tape measure on the mattress, not the frame. Write down length, width and depth. Compare those numbers to the sheet's listed dimensions, not the product name. If the sheet's dimensions are not listed, ask the seller or choose another product.
  • Match the skirt depth to the mattress: Crib mattresses are thin, cot bed mattresses are thick. A sheet with a shallow skirt will not stay on a deep mattress. Look for a skirt that covers the full depth plus a few centimetres to tuck under. A sheet that pops off is a sign the skirt is too shallow.
  • Check the shape for Moses baskets: Moses basket mattresses are often oval or irregular. A rectangular sheet may fit if it is generous enough to tuck under, but a shaped sheet is more reliable. If the sheet creates folds, it is not safe. When in doubt, buy a sheet designed for your basket's mattress shape.
  • Buy at least two per sleep space: One on the bed, one in the wash. This avoids middle-of-the-night sheet changes and keeps sleep routines calm. Pre-wash new sheets to check for shrinkage before first use.

Products that help with fit and comfort

Car Seat Footmuff / Cosy Toes Compatible with Obaby

Car Seat Footmuff / Cosy Toes Compatible with Obaby

  • Cybex Priam Lux Carry Cot - Mirage Grey: Cybex Priam Lux Carry Cot in Mirage Grey offers comfort and style for the first six months, designed to provide a safe and cosy environment for your newborn. A carry cot like this has its own mattress and sheet requirements, so check the carry cot's manual for the exact sheet size before buying.

Who this guide is for

Best for

  • Parents who need a sheet for a Snuzpod, Snuzkot, Moses basket or cot bed and want a snug, safe fit
  • Anyone replacing a sheet that keeps coming off or bunching
  • Parents who want to buy the right size first time without guessing from the brand name

Not for

  • Parents looking for a sheet for a full-size single or double bed
  • Anyone who wants a decorative sheet that is not designed for infant sleep surfaces