Do you consider these sizes big?

I bug myself a lot because I see a lot of girls my age (late teens) and a lot of them are skinny, thin arms and everything. I am 5'9, 145lbs and a size 6/8 (half of my jeans are size 6 and the rest are size 8) + my bust is 36C. My legs are hideous though. They're not huge because I run long distance but there's none of that visible separation between the bone and skin on my upper thighs. Guys what do you think of these measurements?