The goalie's fingers should extend out to the end of the finger stalls of the inside palm to ensure a proper fit. However, any more than 1/4" from the tip of the goaltender's finger to the end of the finger stall and the goaltender will not have the leverage needed to properly close and control the glove.

Aside from the lack of control, the glove will also have a tendency to "break back" or fold, which will make the glove difficult to use. The second key factor is that the heel of your hand should line up with the heel and cuff of the catcher. If not, the proper balance between the cuff and catching portion of the glove may be disturbed, making the glove too cumbersome while sacrificing protection.