If one is in between two adjacent sizes based on one's height, then it depends on the ratio between torso length and leg length:
- If one has long legs and a short torso (for a given height), go for the smaller of the two adjacent sizes;
- If one has short legs and a long torso (for a given height), go for the larger of the two adjacent sizes.
Please note that leg length is evaluated based on cycling inseam, which is longer that the inseam of one's pants.