A false cuff can look good on short sleeves of a shirt or a false cuff on the bottom of your trousers. I put a 3 cm (1 ¼ in) hem allowance on my false cuffs.  On top of this I need another 1 cm (½ in).  So lets say you are converting a long sleeve shirt into shirt sleeves.  Mark up the amount you are taking the sleeves up, lets say 30 cm (12 [...]