Bests & Worsts Reviews from Amazon

Another reviewer included the weight for each size, but since height is often the driver (as with car seats!), I thought I'd include the height information here too (from the Halo website, sorry about lack of formatting, can't seem to fix it): SIZE AGE HEIGHT WEIGHT Preemie Preemie 14"-19" (36-48 cm Birth-5 lbs (Birth-2.3 kg) Newborn Birth to 3 mos 19"-23" (48-58 cm 6-12 lbs (2.7-5.5 kg) Small Birth to 6 mos 23"-26" (58-66 cm 10-18 lbs (4.5-8 kg) Medium 6 mos to 12 mos 26"-30" (66-76 cm 16-24 lbs (7-10 kg) Large 12 mos to 18 mos 30"-35" (76-89 cm 22-28 lbs (9-12 kg) X-Large 18 mos to 24 mos 35"- 40" (89 - 101 cm 26 - 36 lbs. (11-16 kg)