Dog Jacket - Kong Brand

This jacket is 21.5" long and has a circumference of 32" in the chest just behind the front legs. It has battery a powered LED strip that round the length of the spine. The grey stripe is reflective. It is gently used and has what looks like sharpie marks up neat the neck (see photo). The tag says it's a large but it is not. I've tried it on my slender 45 lb lab mix and I can get her in it but it's much too tight in the chest.