I have a speedy 30, and i thought it was perfect size for me. I found the 25 to look silly on my 5'7 body. But, now that i've seen hundreds of celebs \carrying the 30, it looks rediculous...TOO BIG! hahah like luggage! wth!?
I'm only five feet tall and I have a mono Speedy 30 and will be getting a Damier Speedy 30. I don't find it too big at all! It's perfect. I found the 25 too small and much harder to get in and out of.
I'm also only five feet tall and have the Mono 25, 30, and soon, the 35. I never use the 25 as I find it too small. I love my 30 and it doesn't look too big on me at all!