Is a 150x200 cm mattress a standard size?

A 150x200 cm mattress is a recognised format available without custom order, but it falls outside the three main standard sizes in the Netherlands and Belgium. The standard double widths are 160, 180, and 200 cm, which means the 150x200 is less widely stocked than those formats. It is available from specialist mattress retailers without a price premium or extended lead time, but bed frames, slatted bases, and bedding in this exact size are less commonly found than for the main standard widths.