Good Dog Mighty Wood Chew Toys. The chew sticks are made from the best materials mother nature has to offer. The used coffee wood is an ideal resource for dog chew sticks. It is a lot harder than other woods, which is why the sticks are particularly resilient and less likely to splinter. 100% natural solid wood dog chew Extra tough and long-lasting Sustainably Harvested Perfect outlet for instinctive chewing behaviors Cleans teeth and gums plus entertains your pet Available Sizes (Approximate): X-Small: 10-12cm L x 2-4cm diameter Small: 12-15cm L x 3-5cm diameter Medium: 15-20cm L x 4-6cm diameter Large: 20-25cm L x 5-8cm diameter X-Large: 25-30cm L x 5-9cm diameter.