Recently I had the opportunity to try 30 and 35cm croc Birkins. I had always thought I'll go for a 30cm, as I'm generally a 30cm gal, but the 35cm was surprisingly attractive. The 30cm was more proper and ladylike while the 35cm appeared trendier and younger due to the "bigness". My intention would be for a croc Birkin which is elegant yet hip and younger. Of course the colour would have something to do with it. I suspect the 35cm looked good on me because of the dark colour. It was black with fuschia strap. The 30cm was also in a darker colour, navy blue with blue jean piping. Perhaps 30cm would look good in brighter colours while the 35cm in darker colours. What are your experiences with 30 and 35cm croc Birkins?