although many authorities consider any sheet-metal thickness of 0.250 in and greater as plate. Cold-rolled steel sheets are generally available from stock in sizes from 10-gauge (0.1345-in) down to 28 ...

An easy way to remember sheet metal thickness is that the higher the gauge number, the thinner it is. The thicker the sheet ...

When buying sheet metal, the SWG size gives the thickness measurement, but the length and width measurements are also needed. Bulk buying metal, as with most items, can save money.