signature in most applications is 4mm, measured from the top of the apple to the bottom of the apple. The minimum size for the Apple User Groups vertical si...

https://www.apple.com/jp/usergroups/registration/pdfs/UserGroupsSTL2003.pdf

Using AirPods Pro 2 with iPhone and iPad to Help Protect, Assess, and Assist Hearing White Paper Using AirPods Pro 2 with iPhone and iPad to Help Protect, A...

https://www.apple.com/jp/health/pdf/Hearing_Health_Features_on_AirPods_Pro_2_October_2024.pdf