87" length x 62" height x 47 1/2" width - 54" head space underneath and a 27" wide ladder. Very solid loft bed with desk and shelves and 3/4 inch plywood where the mattress goes. Our son wanted a laugh bed and so after looking at a few that were around 4 to $600 we realized that they just weren't that sturdy and there's no way they would last with an 11 year old boy. So we decided to build our own And make sure it's sturdy enough to handle A rambunctious 11 year old boy. A twin mattress fits perfectly and we have 1 that goes with it for an additional $25.(It has been steam-cleaned) Completely fastened using deck screws - made to last. Could probably use it as a tornado shelter lol $100 obo Pick up in Florissant $25 for mattress.