The below is liberally paraphrased from http://www.physics.mun.ca/~sstamp/knives/canada.htmlcraig5381:Does anyone know the law regarding the length of Dive Knife Blades? In England and generally all over the world, if this is not too bigger question in itself! I do not fancy a stay in jail!
Thank you for your responses
Craig
So... yeah - I know some people that could technically get in trouble.... As with most things - common sense goes a long way. Getting caught with it under your street clothes == bad. In your trunk with your dive gear == officer doesn't care.In Canada - certian knives are "prohibited weapons". Basically, this bans switchblades and knives that you can flip open ie. swinging/snapping the knife in a circular motion. Note one handed opening via holes in the blade, disks, studs etc., are not illegal.
There are no federal laws about about the lengths of knives allowed. As far as I know, no provinces have specific legislation about knife lengths either. However there are many informal "blade length rules" in Canada. These vary from 3" to 4" for folders in various areas around the country depending on what differentiates a pocket knife from a fighting knife to the local constabulary
(not a lawyer)
-- greg