# Razor and utility blade sizes: double-edge 43 × 22.2 × 0.1 mm, utility 61 × 19 × 0.65 mm

> What size is a double-edge razor blade?

- Category: Everyday objects › Household
- Kind: Standard part
- Basis: Lab-supply listing for double-edge blades; tool-maker and retailer listings for trapezoid utility blades
- Page: https://xemstudio.com/objects/razor-and-utility-blades/ · JSON: https://xemstudio.com/api/geometry?object=razor-and-utility-blades · Plain text: https://xemstudio.com/objects/razor-and-utility-blades/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- 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.

## Sizes

| 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 |

## Where the files are

- Electron Microscopy Sciences: [Breakable double-edge razor blades (43 × 22.2 × 0.10 mm)](https://www.emsdiasum.com/j-breakable-double-edge-razor-blades) — web — Publisher's page; dimensions are facts
- Nordwest Tecwerk: [Trapezoid blade 61 × 18.7 × 0.65 mm](https://www.nordwest-tecwerk.com/en/products/hand-tools/cutting-tools/blades/trapezoid-blades/trapezoid-blade-tecwerk?page=42) — web — Publisher's page; dimensions are facts
- Screwfix: [Straight utility knife blade 61 × 19 mm](https://www.screwfix.com/p/forge-steel-straight-utility-knife-blade-10-pack/401yc) — web — Publisher's page; dimensions are facts

## Free STEP/STL (4 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/razor-and-utility-blades/index.json

- de-blade-envelope-43x22.2x0.1: [STEP](https://xemstudio.com/files/hardware/razor-and-utility-blades/de-blade-envelope-43x22.2x0.1.step) · [STL](https://xemstudio.com/files/hardware/razor-and-utility-blades/de-blade-envelope-43x22.2x0.1.stl) — Double-edge blade envelope 43 × 22.2 × 0.10 mm (centre slot not modelled)
- utility-blade-envelope-61x18.7x0.65: [STEP](https://xemstudio.com/files/hardware/razor-and-utility-blades/utility-blade-envelope-61x18.7x0.65.step) · [STL](https://xemstudio.com/files/hardware/razor-and-utility-blades/utility-blade-envelope-61x18.7x0.65.stl) — Trapezoid utility blade bounding box 61 × 18.7 × 0.65 mm (ends and notches not modelled)
- blade-bank-de: [STEP](https://xemstudio.com/files/hardware/razor-and-utility-blades/blade-bank-de.step) · [STL](https://xemstudio.com/files/hardware/razor-and-utility-blades/blade-bank-de.stl) — Used-blade bank with a 46 × 1.2 mm slot for double-edge blades
- blade-bank-utility: [STEP](https://xemstudio.com/files/hardware/razor-and-utility-blades/blade-bank-utility.step) · [STL](https://xemstudio.com/files/hardware/razor-and-utility-blades/blade-bank-utility.stl) — Used-blade bank with a 64 × 1.4 mm slot for utility blades

## Questions

**How big is a safety razor blade?**

43 × 22.2 mm, 0.10 mm thick.

**How big is a utility knife blade?**

61 mm long, about 19 mm wide, 0.65 mm thick.

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