flat bar metal sizes
1 Flat bars from 10 x 3mm to 600 x 25mm. 2  Square bars from 10 x 10mm to 100 x 100mm. 3  Round bars from 6mm to 100mm diameter. 4  We also offer a limited range of bright and alloys. 5  Flats and bars are sold in 6m lengths, with some smaller sizes available in 4m lengths.