Is there a way to 'scale' the cut function?

https://preview.redd.it/h8k4xtqguusg1.png?width=892&format=png&auto=webp&s=337dadf531076633d7db150dcee1040155161659

Basically the title- I have a huge model to cut and want to separate his arms and legs from the main body to make it easier to print, but due to the size of the cut plane, it'll cut other parts of the body... is there a way to scale the size of it down so I can get it to just cut the arms and stuff?