Pebbles-Lullaby First Year Age Stickers: Baby Boy, 1 Month Through 12 Months. These stickers are perfect for tracking your baby's first year of growth! This package contains twelve 4x4 inch stickers (one for each month). Acid free. Archival quality. WARNING: This product contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm. Do not mouth or chew. Imported.