I purchase the tree in picture many years ago from St Lawrence Nursery. It is not an apricot but is a plum. I now consider it a nice
spreading tree that give me some plums every year. I included the description from St Lawrence Nursery. They are now between 4 to
6 feet tall in 20 gallon felt pots.
There Description ( A selection of Manchurian Apricot found thriving and fruiting reliably in the Adirondack Mountains, where a 60-day growing season is the norm. The fruit is a small apricot, superior to the unselected Manchurian, with a non-fuzzy skin, (more like a plum,) and a dense, sweet flesh. Unlike the the wild Manchurian Apricot, it does not require a pollinator.)