Congratulations! That's awesome and a nice looking litter. Looks like they all have their milk bands, so that's definitely a good thing. As to the size/number in the litter: that all depends on the genetics. I have one female who will regularly throw 18+ in her litters and others who average 11 to 12 per litter. That's great that she threw that size and that number on her first go round and they all look to be a healthy size with no apparent runts in the litter. Congratulations and good luck with her!