Last updated September 2nd, 2026
The measurements are saved using local storage in Chrome. If you have Chrome sync switched on, Chrome may sync them between browsers you are signed into, same as your bookmarks and passwords.
On the sites that the extension supports, and only those sites, it reads text, looking for garment measurements. When measurements are found, it runs a local test to determine a sizing verdict. The verdict is presented to you and then discarded.
The extension does not run on any other website.
Click the sizebear icon in the Chrome toolbar and choose "delete my measurements". Doing so removes everything sizebear has stored.
Uninstalling the extension also removes it.
If sizebear's privacy policy ever changes, this document will be updated, and the change will also be in the extension's store listing.
sizebear is not meant to be used by children and does not knowingly store children's data.