S: 42cm-52cm; dog weight : 7kg-12kg M: 52cm-62cm; dog weight : 10kg-17kg L: 62cm-77cm; dog weight : 17kg-27kg XL: 72cm-91cm; dog weight : 25kg-40kg Reflective adjustable high-quality materials fine production Product Name: saddle harness belt (Oxford) Material: Oxford cloth (100% polyester) Note: The size measured by hand so it may have a little 1-2 cm difference. You can refer to our size before you choose the size. Due to the difference between different monitors the picture may not reflect the actual color of the item.