Razor and utility blade sizes: double-edge 43 × 22.2 × 0.1 mm, utility 61 × 19 × 0.65 mm — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/razor-and-utility-blades/  (CC BY 4.0)
Basis: Lab-supply listing for double-edge blades; tool-maker and retailer listings for trapezoid utility blades
Catalog version: 2026-10-20

Sizes: see table below
- Double-edge (safety razor) blades: 43 × 22.2 mm, 0.10 mm thick, carbon or stainless steel; the centre slot pattern is not published, so holders should clamp by the edges or use the razor's own posts.
- Trapezoid utility (box-cutter) blades: 61 mm long, 18.7–19 mm wide, 0.65 mm thick; end angle and the two back notches are not published (they vary little; measure one).
- Cartridge razors (Gillette, Schick, Harry's...) are brand-specific: a measured Xem scan is planned on request.
- Blade banks (free STL): slot sized for each blade; print PETG, close the box with the last layer and recycle it full as sharps.

blade  length_mm  width_mm  thickness_mm
double-edge safety razor  43.0  22.2  0.1
trapezoid utility blade (Tecwerk)  61.0  18.7  0.65
trapezoid utility blade (Screwfix listing)  61.0  19.0  None

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Electron Microscopy Sciences: Breakable double-edge razor blades (43 × 22.2 × 0.10 mm) — web — Publisher's page; dimensions are facts — https://www.emsdiasum.com/j-breakable-double-edge-razor-blades
- Nordwest Tecwerk: Trapezoid blade 61 × 18.7 × 0.65 mm — web — Publisher's page; dimensions are facts — https://www.nordwest-tecwerk.com/en/products/hand-tools/cutting-tools/blades/trapezoid-blades/trapezoid-blade-tecwerk?page=42
- Screwfix: Straight utility knife blade 61 × 19 mm — web — Publisher's page; dimensions are facts — https://www.screwfix.com/p/forge-steel-straight-utility-knife-blade-10-pack/401yc

Free files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/razor-and-utility-blades/index.json
API: https://xemstudio.com/api/geometry?object=razor-and-utility-blades