Okay, this beautiful girl is 9 months now. But I made this right after she was born & thought I'd made it plenty big enough. But, it fit her when she was only 3-4 months old. Which shows you how much I know about babies! It's cotton & I could not get the neck to be the right size (I can't remember which book I got this from--something from the library). So I just made a neck opening and crocheted buttons to close it. The trim on the edge is also crocheted.