Small, smaller, smallest

The little cats arrived with a birthday card from my brother, a couple of years ago, and live on the bookshelves. I don't know who cut them, but the smallest one is very tiny; the largest is about 5 cm long. This was a quick, late night photo. If I was doing it again, I would take them out of their box and stagger them a little bit to give them a bit of depth. I could also find some less scruffy books against which to display them. A lot of our books are quite elderly now - as we are, I suppose. Some are from charity shops, some belonged to my parents, some were bought new in the 1970s and 80s, and many of the more recent acquisitions were bought used online.