An even smaller repeat might be better for children's clothing. For my first swatch I actually printed this at 675 pixels/inch with the horses at 1 inch long, it printed great. Though probably 450 would be best for clothing.
This design was inspired by a painting I did years ago of my horse; she was a sorrel like the central horse in the design.
Full sized design here: http://www.spoonflower.com/fabric/944261
