That kind of sounds like you think we're a supplier or stockist, we're just people like you sat at home at their PC at this moment in time.

If your question is general though, you can make a tree or shrub into a standard of whatever height you choose - it's purely your choice and decision.

A bay tree left to its own devices will make a full sized tree eventually if it doesn't succumb to cold weather.

A 1/2standard is a plant with a single stem or trunk between 2 1/2feet & 4 feet before a head of branches,
a standard is a plant with a single stem anything over
4 feet. hope this helps, derekm

Ah, thanks Derekm! Here in the USA, standards are sold by how many feet the trunk is.