What size knife can I legally carry in the UK?

Sep 23, 2025

Knife laws in the UK are governed by the Criminal Justice Act 1988 and the Offensive Weapons Act 2019. Understanding these rules is important for anyone who owns or uses knives, whether at home, in the kitchen, or outdoors.

In general, you can carry a folding pocketknife with a blade length of 3 inches (7.62 cm) or less (this includes Higonokami of this size as they do not lock the blade open with a button or latch), without a locking mechanism, in public without needing a reason. Anything larger, or any knife with a locking blade, requires a “good reason” or lawful authority to be carried in public.

This is where chef knives, including Japanese kitchen knives, become complicated. Technically, owning and using a chef knife at home is completely legal. However, carrying one in public without a valid reason - for example, transporting it wrapped and stored securely after buying it, or taking it to work if you are a chef - could be considered illegal if you cannot demonstrate that purpose.

The law is designed to balance everyday use of knives with public safety. Carrying a chef knife to work in a roll or case is lawful if you can show your profession or purpose. But simply having one in your bag or car without explanation could result in prosecution.

In short, only small, non-locking folding knives under 3 inches are freely allowed in public, while chef knives require a clear, legitimate reason for carrying.

When purchasing a knife from us, we operate an over 18 age check policy on all bladed products.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Knife laws may change and interpretation can vary - always check the latest UK government guidance or seek legal advice if unsure.

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