I acquired a Blenheim back in late September and he is just coming up on 6 months old. His name is Pesto. If I'm not mistaken, he seems like he'll be on the larger end of this breed's size! At around 5 months old he was already around 13lbs.
These are from back around first getting him, between 2 and 3 months old
Here is one more recent,
I've already learned much from lurking on this site, and hope to learn more as I think of questions I have along the way.