"Swords" are usually shaved down on the sides and out of the back blades with a plane or spokeshave, then covered with tape. Once taped, they cannot be less than 31.8 mm (1¼ inches) in diameter. Swords may be fitted with a thrusting tip, which is required to have at least 12.7 mm (½ inch) of progressive give, and may not double over. A basket hilt, quillions or the equivalent is required.
Axes are considered a mass weapon and thus cannot weigh more that 4 pounds. The head can be constructed out of several materials, the most common being closed cell foam (like a camp mat) and must have progressive give over the whole head.
Maces often have a foam head with rattan splints attached to the outside, this is then taped over and is usually attached to a handle(haft) that is relatively short and is also considered a mass weapon
It is a good idea to shape the handle of your weapon so that you can tell if you are hitting with the "blade" or the "flat" of your weapon.