The white light emitting Julius-K9 Ask to Pet Me Hook and Loop Changeable Dog Harness Patch for your harness allow others to see the status of your dog, such as if it's a guide dog, sniffer dog, security dog or even if they should pet it or not. Fun canine labels are also available, such as 'Girl Power' and 'Hero'. How to choose the right size and adjust the harness? To have a comfortable harness, it is essential to choose the right size canine harness patch and to adjust the harness properly. Black dog harness label with white fluorescent text Large dog harness patch (6-1/4 - 2 in.) IDC Power harness: Size: 1, 2, 3, 4; IDC Power harness with safety lock: Size: 1, 2, 3, 4; IDC Color and Gray Belt harness: Size: 1, 2, 3; IDC STEALTH Harness: Size: 1, 2, 3; IDC Power harness for guide dogs: Size: 1 Small dog harness patch (4-1/4 - 1-1/8 in.) IDC Power harness: Size: Baby1, Baby2, Mini-Mini, Mini, 0; IDC Power harness with side rings: Size: 0, 1, 2, 3; IDC Power harness with safety lock: Size: 0; IDC Color & Gray Belt harness: Size: Mini-Mini, Mini Allow others to see the status of your dog