Top flaps on these boxes overlap and are closed by wrapping attached heavy duty string around plastic eyelets. features: 24 x 15 x 10 1/2 string and button file storage boxes boxes feature a write on area on two sides for labelling with content information string and button closure secures contents even if box is overturned this box was designed to store legal size files boxes are manufactured from 250# white corrugated sold in case quantities of 12 the dimensions provided are the inside dimensions of the product