The correct fit of a soccer goalie glove is determined by the amount of room in the finger tips, palm side, backhand, and side of the gk glove. Is the extra room or tightness in the goalkeeper glove manageable? Does it help control the save or does it hinder it?
A finger nail length or 1/4 of an inch is optimal in the finger tips. A little more or less can also work. A goalkeeper just does not want 3/4 of an inch or more since the goalie glove will be harder to control and wear incorrectly. The sides of the finger should also feel manageable. Is it too tight or does it feel like your fingers are sliding around inside the finger and finger patches.
The hand and glove should feel like one and comfortable during the save. It is important not to have excess room or bunching in the palm, backhand, side, or wrist closure. If a Goalkeeper gloves has finger protection too much room can make the fingersaves feel awkward. Conversely make sure the glove is not too tight when trying to pull it on or take it off. If a glove is too tight the goalkeeper glove could rip in the palm, in the seams, or at the wrist closure.
Sizing soccer goalie gloves can be difficult since goalkeepers come in all shapes and sizes; manufacturers may have different sizing; and keeper have their own priorities. Contact keeperstop.com in the USA regarding adidas, Reusch, Uhlsport, Elite Sport, Storelli glove size questions.