After extensive research, I finally purchased this item and am so pleased I did. My main concern was determining if albums would fit easily when stored in clear protective sleeves. I could not believe how hard it was to determine the internal measurements and, after a few replies from a few Amazon customers, I still could not determine the exact sizing. In desperation, I emailed the manufacturer who responded as follows "Internal dimension LxBxH (mm): 320x133x335 (H= box 293+ lid 42= 335 mm)" All sounds a bit "Picky" but was well worth the effort to achieve the result of having a product that will do its job and match my hi-fi system speakers perfectly. Hopefully, the pictures submitted will help anyone in the same position as I was. There are 24 albums in the box including two doubles, one triple and some gatefolds equating to around 29-30 total. Still room for another half dozen. Seemed a bit expensive when looking online, but once purchased, you will not be disappointed.