on-strike batsman, the leg side is to their right, and from the bowler's perspective, it is the left-hand side. From the on-strike batsman's perspective, it is therefore the side of the field corresponding to their non-dominant hand.

In the picture, the right-handed batsman, facing the bowler in normal batting stance, has his legs more on the right side of the picture, the leg side. If the bowler bowls the ball down that side of the pitch it will be "on" the batsman's legs, the on side.

Batting and the leg side

Batting

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