Circle size 4d5a38

For regulations surrounding circle size, see: Ranking criteria 6t2835

Circle size (CS) is a beatmap difficulty setting that affects the size of hit objects. Circle size values range from 0 to 10, but only values from 2 to 7 can be chosen in the beatmap editor. Other values can be used by manually editing the .osu file of a map.

osu! 1q5y46

In osu!, circle size changes the size of hit circles and sliders, with higher values creating smaller hit objects. Spinners are unaffected by circle size. Circle size is derived through the following formula:

r = 54.4 - 4.48 * CS

Where r is the radius measured in osu!pixels, and CS is the circle size value.

osu!taiko 652a5g

In osu!taiko, circle size does not affect gameplay.

osu!catch 2n4bx

In osu!catch, circle size determines the size of the catcher and the fruit.

osu!mania 6p4j4c

In osu!mania, circle size refers to the key count.

Mod effects 1w6v10

There are two mods that alter circle size when activated:

• Easy: Halves the CS value.
• Hard Rock: Multiplies the CS value by 1.3, up to a maximum of 10.