I actually sized up as I am a 32-33 waist. But either 35 or 36 should work for you. I have a pair of 36s I wear and the thighs measure right at 13.5". That combined with the relatively high rise should give you ample room. I would order the 35 and 36 and return the one that doesn't work out. Not sure how slim you are trying to go.
9/13/14 at 3:53pm