I don't often order jeans online simply because for women, no matter what size you are, jeans always fit differently depending on style.  Having been a fan of 505's for years now, I took my chances ordering online.  (I hate shopping)

Jeans arrived earlier than expected, fit perfectly.  If you know your size and have bought 505's before, I would say it's safe to order these online.  They are exactly what you'd find in a department store.  I'm very happy with my purchase.