Small Trees For A Garden With Limited Space.

Can you recommend a smaller tree for my garden?
The following small trees would be suitable for your garden.These trees are to limit the total size by light annual pruning in the autumn –
Amelanchier lamarki,
Gladitsia triacanthos Ruby Lace,
Acer Negundo Flamingo,
Malus Red Jade,
Robina pseudoacasia,