I ordered this as dimensions say 6 x 4 storage shed. so in preparation I poured a raised slab with 12 " x6" high border wall.  So that I could give myself more headroom ( picture is deceptive, there is only 71" of height at the sidewalls)  Actual dimensions were 38" 1/2 by 78'1".  There is nowhere in their manual with an email address or phone #.  They also need to have a native english speaker proof their script before they send it out.  I really am not a happy camper with this purchase, the only thing
 that saved this is that i have been a contractor for 22 years and could make the parts needed to at least erect this.    There is no floor and no mention of anchoring this shed to the ground. Thats why I made a foundation, so that I could anchor it.  Honestly there were so many flaws in this shed I recommend that you steer clear.