For dogs beteeen 35-55lb (16-25kg) and waist 18-27inch (45-68cm) Before use: Try for fit and to get right size. Wash diaper for optimum performance. The more you wash it, the softer and more absorbing it gets. Easy to wash and try. If accedents happen, was with stain & odor reover like Simple Solutions Stain+Odor Remover. Further directions on the package. Simple Solution - Washable diaper Ideal for female dogs in heat, during travel (in car or soft carrier) or for incontinente dogs. Product features: - Moisture-wicking liner protects skin and coat - Super-absorbent microfiber pad - Soft, breathable stretch fabric - Plastick liner for leak protection - Repositionable tabs for a secure fit