The shape of your large meeple looks the same as your normal meeple, but it is 18% larger.
Instead of placing a normal meeple on your turn, you may place your
large meeple. Placement rules are the same as those for normal meeples.
When scoring a feature where a large meeple is present, the large meeple counts as 2 normal meeples for the purposes of determining which player has control.
Remember that all players tied for control of a feature score all the points. If you have more meeples in a feature than any of the other players, you score all of that feature's points, and the other players score nothing.
After scoring, any large meeples in the scored feature are returned to their owner's supply, and can be used again in a later turn.