Skinny jeans are a little different to hem than traditional jeans. The inseam will need to be a bit shorter because you want them to sit right at the ankle, so remember this when measuring. You also may need to use a stretchy thread if the fabric has more movement than standard denim. Be careful when hemming skinny jeans with a machine, it’s very easy to catch an extra layer in the machine because the leg is so small. I recommend using a hand backstitch to hem skinny jeans.