Our over-collar dog bandanas are crafted and manufactured in the UK using 100% cotton. We recommend hand washing the bandana to maintain its quality. These bandanas come in different sizes to fit your pet perfectly. The available size is small, with a width of 20cm, a length of 14cm, and an opening for the collar of 4cm. The other sizes include medium and large, with varying widths, lengths, and collar opening measurements. Please note that all measurements are approximate due to manufacturing methods.