I have 4 of these boxes for my watch collection, and will buy more.  There is plenty of room side-to-side for watches up to 56mm (measurement including the crown) in the front 5-pillow area.  The back pillows easily hold 2 large or mid-size watches, or 3 watches of 40mm or smaller.  My thickest watch is 18mm, and it easily fits with 1/2" of space left above it.  There is even room to put a smaller pillow in between the back large pillows for a smaller sized watch.  The fit and finish has been excellent on all of the boxes.  No problems with the hinges, material, or pillows.  I have an 8-1/4" wrist, have mostly bracelet watches, and they fit the pillows snugly.  I contacted the company with a question before I bought my first one, and they answered my request with the information I needed very promptly.  Highly recommended!!