Quicksilver has the best surfer's clothes design, hands down! What I love most about it is how they blend colours really well. The best part is, the board shorts always have a HUGE variety of colours and patterns so it's quite hard to find someone else wearing the same shorts as you.
Quality wise, it's my best I know so far. I live by the beach and I have collected a lot of board shorts over the years. Most of them wear off after a while because of the sea's salt water, but not Quicksilver's.
Another thing is, the fabric is very smooth, so it doesn't trap sand. Size-wise, I am very sure you can find your size! I had a hard time looking for a size 28 or 29 in other shops! Also, if you can't find one that's small enough for you, you can always try their teenage's range!