I am a size 10/12, ordered the 12/14 and they were way too small. I sent them back. Usually Next sizes are perfect for me. I was very disappointed with the quality. I bought a brilliant pair of leggings from Next about 7 years ago costing £20 and have only just thrown them out having worn them constantly. They were size 10 and although not advertised as "control" leggings they were. I wish Next still sold these ones.