How much bigger is the LG G Watch R than a regular watch?

Not very. Though that depends which regular watch you're looking at. On the left is what I would consider a large watch - or it sure is compared to others that I own - and on the right of course is the LG G Watch R. The G Watch R is a little bigger and a little thicker, but it's not perhaps quite as big as some images would lead you to believe. Whether it's your style, that's a different question.