I've been using a True Sleeper mattress for about 5 years. It's in poor condition, but still usable. I used a sheet on top of it, so it's not very dirty, but it's worn out. The True Sleeper specific sheet is also torn and stained. Please purchase this only if you understand the condition. Size: Approximately 140 cm wide, 195 cm long, and 3.5 cm thick.