i got this hat in size up to 12month. it fits 7month old baby (she is average size baby). i hope it will last for 4-5 month through summer and still be good fit. material is nice, colors more blue that at the picture but looks nice and bright. what i didn't like very much is the floopy part, it looks smaller than expected. will see how it works for us. the strap is fine but my baby tried to chew on it as soon as i put the hat on her. also it can be removed as it on small snaps.