My adult daughter purchased these and is writing the review.
She says:
Hello ladies! I am a solid size 14 (in bottoms). I am just shy of 5' 7" with a pear shape and athletic (fuller legs) body.
These board shorts fit me like a glove. The length is PERFECT, they do not rise on me when walking, which is I appreciate. The fabric is the perfect weight, and the adjust ability of the waist (it ties and has velcro too) was IDEAL to cinch in for my tinier waist.
I wish I had them the three times I traveled to Hawaii.
I did not have to go up a size. I stuck with the 14. They have a slight give and this was sufficient for my needs. So, I give a big thumbs up.