Full-form of GI wire is Galvanized Iron wire, which is mostly used for fencing and reinforcement of all purposes.

Galvanization (the process of applying a protective zinc coating to steel or iron, to prevent rusting) has two types, one is electroplated galvanization and second is hot dip galvanization. Hot dip GI wire has better corrosion resistance properties than electroplated GI wire.

The length of GI wire is measured in meters whereas the diameter/thickness is measured in SWG (standard wire gauge).