One size suitable for adults and older children. Dentists recommend replacing your and your family members' toothbrush every 3 months for optimal oral and heart heath. To avoid bacteria growth, don't leave your toothbrush closed off in a damp space. Bamboo helps limit such growth, but you should keep toothbrushes in a dry, well ventilated place. This Bamboo Toothbrush is beneficial not only for your health, it helps protect our environment. It's extremely cost effective, too. Make the healthy and environmentally conscious choice - get Barebu Bamboo Toothbrushes today for your whole family. Feel the difference - physically, maybe even psychologically!Reduce your carbon footprint and your chance of illness from plastic brushes. The Barebu Toothbrush combines a comfortable brushing experience with superb oral health, while helping you keep a clean conscience. Good for at least a years' supply for one person (switching every 3 months as recommended), or replaces all brushes for a 4-person family. Plastic toothbrushes take at least 500 years to decompose. They also make up a large part of plastics that end up in our precious oceans. Ordering these brushes for kids allows you to teach them not just about dental health, but also easy and cost-effective ways to care for their environment. Their brushes won't end up harming wildlife or in a landfill - and we should all feel good about that.HEALTH & EARTH FRIENDLY BENEFITS: - BPA-free - 100% biodegradable toothbrush - Each bristle / brush pieces is pressed into the bamboo handle and absolutely no glue is used in the process. Better health, easier recycling - Ergonomic, comfort-grip handle - 100% biodegradable & fully recycled packaging - Organic, compostable handle - Eco-friendly - Vegan Clean Teeth. Clean Conscience. by BAREBU.