They are more than helpful on the phone, but when you order they ask for your vital stats and will tell you if they think another size would be better.
Do you like the longer cut leg ? 3cm doesnt mean an awful lot without any frame of reference. I'm not sure how their other bibs are sized, and couldn't find info on these ones on the santini website.
Great, thank you. Sounds like a good choice. I may give prendas a call before ordering to make sure I've got the sizing figured out.