For those of you who asked "what size do we wear"? The answer is "I don't really know"
There is no standard sizes in doggy clothes, collars. and harness'. Every company sets their own size standards.
We are growing so what will fit us today may not fit tomorrow, but right now
Kasper & Cookie have an 11" chest, 7" neck, and are 7.5" back (from the base of the neck to the tail)
Tinkerbell has a 10.75" chest, 7" neck, & 7.25" back
Jasper has an 11.75" chest, 7.75" neck, & 7.75" back
Wally has a 12" chest, 7.75" neck, & 7.5" back