Some may find this a boring present, like giving someone socks for their birthday.
The fact is, however, that clothes for an infant have to be bought in large amounts of multiple sizes to accommodate rapid growth. It’s great that when you’re getting apparel for a newborn, there’s really no such thing as getting the wrong size. Sure, it may be too big now, but without a doubt the little one will grow into it. This is truest for a preemie. They’ve no way to go but up. This kind of offering to the new family will be a big help and will show how much you care.
It doesn’t matter so much if it’s a little short on their arms or legs, but if it’s uncomfortable, it has to go. Make sure your little one can move freely and that no flesh is bulging out under the clothes line. If it’s a onesie, it should snap easily without a big struggle. Also, observe how easily it goes over your infant’s head. If it’s too small this will be very uncomfortable for your tot.