What is the difference between an 80x210 and an 80x220 cm mattress?

An 80x220 cm mattress is 10 cm longer than the 80x210 and is designed for sleepers taller than 195 cm. The 80x210 suits sleepers from around 185 to 195 cm; above 195 cm, the 80x220 gives the additional length needed for full body support without feet or legs reaching the end of the mattress. If you are between 185 and 195 cm, the 80x210 is sufficient.