Quote Originally Posted by dylan815 View Post
I'd suggest something just slightly larger around than your snake is in diameter. It Should leave a little bit of a bulge in the snakes belly.


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This^ But as mentioned, aim for 10%.

Having a scale for their general husbandry is good, however, to keep track of the snake's weight so you know when to resort to more drastic responses to inevitable extended fasts, to aid your vet if illness occurs, etc.