Quote Originally Posted by mozbink View Post
after buying the mice based on gram size on box they did not seem big enough when I actually took them out of the box. They were "large" mice but her girth was bigger.
Someone here says he takes his scale to the pet store and roots around in the freezer until he finds what he needs. I did this and the 40g mice at Petco are actually about 65g. If they have singles, you can estimate the whole box pretty well. Or divide the whole box by the # of items inside, minus a little for the box itself.