I did try on a 30 cm Birkin (chocolate) when I was in the H shop the last time and they brought a 35 cm Garden Party (they didn't have any 35 cm Birkin) for my to try as well so that I could compare the sizes and I realized that I could choose either size. I ended up placing an order for a 30 cm (black togo with palladium HW, black lining) Birkin.