Oversize golf grips are designed for players that have large hands or players who find themselves over-gripping (or straining) with midsize size grips. They can also relieve pain from players with arthritis. However, golf grip size ultimately boils down to personal preference. Which is why it's important to choose the right size golf grip, and may require some trial and error before committing to changing your grip size.
If you're new to the world of golf grips, please read: Golf Grips: What you need to know.
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