Check out our new baby trucker hat! Show the baby in your life how grateful you are and get them one of these colorful old school foam truckers. Features a velcro back for easy and fast adjustability. This comes in two sizes! Infant Fit NB - 6M #HILNPG Toddler Fit 6M - 2 Yrs #HTLNPG Definitely use measurements, NOT age, to guide you. Munchkin heads come in all sizes for all ages. 0-6 months 15.5-17.5" 39.37 - 44.45 cm 6-24 months 17.5-20" 44.45 - 50.8 cm Measuring head size is both an art and a science.