# Bearing Sizing

**URL:** <https://forums.yoyoexpert.com/t/bearing-sizing/55830>\
**Category:** General Yo-Yo\
**Created:** [June 30, 2013, 5:57pm UTC](https://forums.yoyoexpert.com/t/bearing-sizing/55830 "2013-06-30T17:57:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![AustinKurkowski](https://avatars.discourse-cdn.com/v4/letter/a/9fc29f/32.png) [@AustinKurkowski](https://forums.yoyoexpert.com/u/AustinKurkowski)\
**Post date:** [June 30, 2013, 5:57pm UTC](https://forums.yoyoexpert.com/t/bearing-sizing/55830/1 "2013-06-30T17:57:33Z")

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What does the bearing sizing actually mean? Like in a size C, what does 0.500, 0.250 and 0.187 correlate to? which is the outer diameter, inner diameter, etc…

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**Author:** ![Nathan](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/nathan/32/191605_2.png) [@Nathan](https://forums.yoyoexpert.com/u/Nathan)\
**Post date:** [June 30, 2013, 8:08pm UTC](https://forums.yoyoexpert.com/t/bearing-sizing/55830/2 "2013-06-30T20:08:56Z")

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The YYE store listing are ID x OD x Width.

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**Author:** ![TheYoYoist101](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/theyoyoist101/32/842_2.png) [@TheYoYoist101](https://forums.yoyoexpert.com/u/TheYoYoist101)\
**Post date:** [June 30, 2013, 9:35pm UTC](https://forums.yoyoexpert.com/t/bearing-sizing/55830/3 "2013-06-30T21:35:36Z")

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They all represent the different dimensions of the bearing. Like how big/small the bearing is.