I can't remember where I got mine from (it was a while ago) but whilst it is a bit small, it is not a problem. It is about 5cm shorter than the length of the table. It is actually quite good as it means there is a little space for cream or a spare wipe. When baby is tiny it is not a problem as they are not that long

We still use it for Miss 3 and it still doesn't seem to matter.