Yes, it does matter. Just because the ball is bigger doesn’t mean you need a bigger glove. Keep in mind that your hand must control the glove and most girl’s hands aren’t very big so they can’t control a big glove. Legally the biggest glove you can use is a 14 inch glove – which is a HUGE glove. Typically outfielders should use a 13 inch glove and infielders and pitchers should use 11 – 12 inch gloves. The glove doesn’t catch the ball – your hand does – the glove only protects your hand. So make sure your hand can move the glove fast enough to catch the ball by being small enough for your hand to control.