1x2x3 Bin for 20 standard utility blades.  Other versions I found all tried to cram as many blades as possible into a 1x2 bin and required the blades to slightly overhang the footprint of the bin to make them grabbable, which doesn't work if there are bins around them.  This bin is simpler with the goal of making even the last blade in the bin easy to access while staying within the grid.  I kept the height small and included a lip so you can stack them, and then grab a single bin of 20 blades if you need them away from you grid, without having to lug around 80 extra blades you probably wont need.  I printed 6 of these for my personal setup which gives me room for 120 blades (a standard pack of blades is 100 plus overflow for the last few leftover from your previous pack).