Im usually a 16 petite 70kg/162cm. I buy a 16-18 in sports leggings in case the waist bands are a bit tight on pms days. I bought these in an XL and they look beautiful, just like the photo. They feel wonderful and soft on my skin…. HOWEVER… Leg material is very loose!!! Loose like slim fit boot cut jeans. The thigh material touched my skin just. Bum and waist feel ok but i wouldn't chance running in them. The lower calf so around 30cm/12inch of the lower leg to floor, are a good 3cm away from my skin (like boot cut jeans) getting a little wider at the ankle. I thought it was because i was petite however my friend put them on (5ft7in size16) and it looks worse on her as quite baggy still around lower leg. Im returning these only due to fit. Im DEFINITELY ordering the smaller size down large (14) in the hope of a snug legging fit and hope the waist isnt too tight. TBH if they are also a little big around the calf/ankle still i’ll keep them anyway to fit over my docmartins as i love the rest of the look and feel so much!!