Size up, no kidding! I normally wear a 6 or an 8, I ordered a 12, and its almost snug in the seat! As the other reviewer mentioned, the pockets could be bigger, but other than that are nice pants.
I bought 2 of these pants last year (brown and ash bark) for a 4 weeks backpacking trip to India, and although I packed 2 other pair of pants from a different company, I just kept on washing and wearing the LLBean brand non-stop. The material is very comfortable, the length is perfect and they take no space at all, you can pack them in your purse! I am 5'6", 120 pounds and I ordered a size 6 regular, they were perfect (size and length)! Also, they dry super quick which is great, I would wash them in the evening and hang them in my hotel room and they will be ready to go early next morning. The only complaint is that I wish the pockets where a bit deeper and bigger, a side from that, they are great. I am waiting for new colors to come up, I am going to Jordan in few months and would love to get 2 more of this pants!