import bpy

num = 0

for o in bpy.data.objects:
    if o.dimensions[0] > 2 or o.dimensions[1] > 2:
        num += 1
        print("should delete " + o.name + ": " + str(o.dimensions[0]) + "\t" + str(o.dimensions[1]))
        o.select_set(True)
        bpy.ops.object.delete()
        
print("Deleted " + str(num) + " objects")