I have one which really is tall enough for Max to use, and when he stretches up his paws are on my hip bone! This is the only place I’ve ever seen one as tall as this. The sisal isn’t wound quite tightly enough and I’ll have to replace it eventually, but it is so much better than anything else I’ve found. The cat in the photo must be quite small!
http://www.zooplus.co.uk/shop/cats/scratching_posts/scratching_posts/281653