I got my first tribble back around 2005, and I attempted to make clear to my wife that crumbs in bed from snacks might have unintended consequences. It started out simple enough... ... the brown one is our first tribble. But then we soon had more. ... and more... We've been adopting them off to people, but some how we only seem to be able to maintain a manageable number. Generally we end up with three broad types... small, medium and large. And at my wife's request I made a tribble-visual-scale to help tell how big they are (the bands are one inch apart). Here are some examples of the small ones... The medium sizes ones... And the large... Recently we ended up with a pink one (like from TAS)... ... so we are hoping that we help us with controlling the population.