I use a regular household scale that weighs in grams, I got it at Target for about $30. Fuzzy mice are a bit small.. ours eats a regular size mouse weekly. How do you know it weighs 121? Its very pretty but going by the picture looks small for being almost a year old.

Follow this thread, it shows pictures of the scale I use.
http://www.ball-pythons.net/forums/s...149#post791149