Bastion is canonically 2.2m or 7'3", but I believe that's counting the gun barrel that sticks up over their head. In Sails they've been scaled down just a little bit so that they can fit through the doorways but they're still like 6'6".

Wilson is 167 cm, which is JUST under 5'6"; he rounds up. That's not counting his hair, which adds around three inches to his height but doesn't boost his eye level.

Wormwood is 6'0".

Webber is about four feet tall, and if I've pinned an exact measurement to that I don't have it handy.

Yochelm is I think 5'9", which is perfectly average, but he often looks tiny because most of his friends are tall (except the one who's usually in pigeon form).