Track your baby's development with these Arch Baby Monthly Milestones. The perfect way to capture memories as your little one grows, these milestones cards allows you to take monthly photos to capture your baby 's growth during the first year. DETAILS: • Set includes 12 disc (One to Twelve) each arch is 3 inches wide and 4 inches tall • Engraved on 1/4" premium maple plywood • Acrylic 3D numbers • Muslin storage bag NOTE: Natural raw wood has variations and slight imperfections, including knots and darker wood grain; no two pieces are identical. Warning: the discs are not a toy and is not intended to be played with by infants or toddlers.