Our Mission: To protect, preserve and promote the natural integrity of Radnor Lake through land acquisition, environmental education and park support.
Chains up to 12 mm thick are generally portable: you can carry them around on your bike every day. The long ones will be really heavy though, so please check the weight. Above 12 mm the chains are more suitable as stationary locks: you would leave them wherever you lock your bike for long periods of time.
Say the instructions call for your jump rings to be 18 AWG and you purchase 18 SWG rings. You will find more likely than not that the SWG rings will actually be a smaller wire diameter than the AWG even though they are both 18 gauge rings. This means that the SWG rings may be too small for the chainmaille pattern to work. Another term thrown around in chainmaille is Aspect Ratio.