Bigjigs Rail Rail Name Letter O (Colors Vary) Bigjigs Rail Name Letter carriages are a wonderful addition to any wooden railway system Add the letter ''O'' to your wooden railway - spell your child's name or any word you want Measures 2.5'' with removable wooden letter; colors may vary Most wooden railway sets are compatible with Bigjigs Rail, making Bigjigs the perfect choice for starting or extending your collection Bigjigs Rail is suitable for children ages 3 and over, and conforms to ASTM and CPSIA safety standards