Yeah, my sister-in-law had the same experience. Her baby outgrew the absorbancy of the xsmalls before she outgrew the actual size. She just moved up to the smalls at that point. You could either move up to the One-Size or just add a liner.

If the liners you have are too big (I can see the One-Size liners being pretty big/bulky in such a small diaper) you could always just use a cut-up old towel or receiving blanket. It's most likely just a matter of a few weeks at most before she totally outgrows the xsmall so you really only need a temporary solution, probably not worth the cost of buying small liners.

Karen.