Here are my Montmorency twin trees this spring. They were bought and planted at same time, side by side, in 2012, and are semi dwarf but seems small for their age. That being said, they produce really well most years, though last year for reasons I can’t figure out the cherries were much smaller. Here they are:
I also have a Northstar that will be fruiting the first time this year (well, it bloomed a lot) and can get photos easily later.
Actually, you can see it in the second photo above. It is the small blooming tree on the back, left.