Capture your little slugger's first year in the cutest way possible with these wooden baseball monthly milestone markers! Perfect for photo props, these markers will help you document every precious moment of your baby's growth. PRODUCT DETAILS: Material: 1/8'' Baltic Birch Plywood. Each piece is made from natural raw wood and can have slight imperfections, including knots and darker wood grain. Set Includes: 13 individual markers; Opening Day - Twelve Months Size: 4 inches in diameter WARNING: These discs are not a toy and are not intended to be played with.