block-size & inline-size
Defines the horizontal or vertical size of an element’s block, depending on its writing mode.
Outlook
Windows
2013
2016
2019
2022
Windows Mail
2022-07
macOS
16.56
16.80
Outlook.com
2022-07
2024-01
iOS
2022-07
Android
2022-07
Samsung Email
Android
10
11
Mozilla Thunderbird
macOS
91.11.0
Fastmail
Desktop Webmail
2022-07
HEY
Desktop Webmail
2022-07
LaPoste.net
Desktop Webmail
2022-07
1&1
Desktop Webmail
2022-09
Android
2022-09
Mail.ru
Desktop Webmail
2022-07
WP.pl
Desktop Webmail
2024-04