These one-piece Sure Tuck-Stock cartons are 200# C Kraft or ECT equivalent.
All four sides have top flaps that fold in.
They are plain (unprinted).
They are packed 50 a carton and shipped to you flat.
The sizes start at 3 x 2 x 2 (inside dimensions) and go up to the 36-inch sizes.
The sizes in the SIZE drop-down box are in inches, length by width by depth (in inches):