Q. Which Bullet bike is suited for short heights?

Classic 350 will be perfect but I will suggest you to please take a test ride because safety is no.1 priority. Take a test ride of classic and thunderbird and check that can you easily handle the bike in traffic and can you handle the weight of the bike than decide which bike to buy.

I will give you my honest opinion on this. If keeping both feet on the ground while idling is what you would want then the stock seat on a 350 Standard is too high for you at 5' 5'. I am 5' 11' and I have to stand just a little to keep both my feet on the ground. If you are okay keeping one foot or the foot peg and the other on the ground then go right ahead.

Bare minimum height 5.4 ft. That too with altered seat & Riding boot will make confident riding