Our ultimate and perform ranges run true to size, E.g. If you are a size 12 then we would recommend a size M.
This also applies for when ordering from our Basics range, if you would usually be a size 12, then the size chart will advise you that L is the correct size for you.
For more help with sizing see the sizing guide (linked below).
Remember, if unsure on which sizing to choose, to always measure the widest part of the hips!