Diaper Size Calculator

Signs you need the next size include: frequent blowouts or leaks, red marks on baby's thighs or waist, difficulty fastening the tabs, or the diaper looks too snug. It's better to size up slightly early than too late.

Newborns use about 10-12 diapers per day. This decreases to about 6-8 per day by 6 months and 5-6 per day by 12 months. Most babies use about 2,500-3,000 diapers in their first year.