Well I'm 5'2", size 4 feet, and had my two dds with an epidural, was cut first time (had ventouse delivery), tore a little second time. However it depends what you mean by "easy" - I found both labours pleasant and stress-free. dd1 was 6lb13 and dd2 was 7lb.
I'm planning to have this db (due July/Aug) in a birthing pool with just gas and air to help, and my size has not been mentioned as a possible problem. My m/w is smaller than me and has children, so I'm sure it is an issue she would have brought up if she thought it was necessary, given that she knows my birth plans.