If you are following a pattern you may need to make a different number of chains to start. This will change the number of stitches you make in further steps but will not change the general technique.

Doing two stitches in each one stitch from the previous round is how we “increase” the size of the circle we are making.

See a pattern developing? To keep increasing, put two stitches in the n-th stitch where n is the number of the round you’re currently working on. For instance, if you are working on the fourth round, put two stitches in every fourth stitch as you work your way around. You may loop a shot piece of contrasting colored yarn through each round if you wish, to help know which row you are on.