For foil rolls, the max width is 500mm. The roll inner diameter is 76mm. Out diameter is normal 220-300mm as requested. Candy foil in roll is generally used on packaging machines, saving much time in the packaging process.
For foil sheets, The minimum size there could make is 50mm x 50mm as foil wrapper in sheets for foil sheets. The max width is 500mm, and the popular export sheet size is 500mm x 700mm. Foil sheets are used to wrap chocolates by hand.