How it fits. Measure the inside of the drawer at the narrowest point and the height from the drawer floor to whatever is above it. The organizer prints 1 mm smaller than your width and depth on every side and 0.5 mm lower, so it drops in and doesn't rattle. Walls are 1.6 mm by default (plenty for cutlery; go to 2 mm or more for tools), floors 2.4 mm. Movable dividers print the tray open with a slot pair every 20 mm along both walls and the dividers as separate plates, so you can move them later; they run one way only, and the tray has to print in one piece. Anything up to 250 × 250 mm prints in one piece; bigger drawers print as two or four pieces that sit side by side — the layout shows the seams and the price says how many. Wide trays go in PETG with a brim so they stay flat. Coming later: pockets shaped for the actual things — sockets, pens, calipers.