Some commercial offerings are quite good as well. These hedges come from Miniature Worldmaker. They look good to my eyes, but the banks are a bit lower than I’d like. The pieces are 20mm high and could probably be used with either 15mm or 20mm miniatures.
Ironclad miniatures’ Bocage hedgerow system (20mm) is OK, put some static grass or flock on the banks and you’d be good to go.
And of course I quite like the 6mm bocage I made myself for use in IABSM. There’s a picture below and a post here showing how I made it.
Unfortunately there’s an awful lot of rather bad bocage terrain out there – commercial and home made hedges that are based on a fundamental misconception of how the banks of bocage hedges are formed. Stuff that I call Mocage, .