Via [url=https://steamcommunity.com/games/CSGO/announcements/detail/697641379212296486]the Steam Community[/url]:

[quote=Valve][b][u]COLOGNE 2026[/u][/b]
- Added display of lowest and highest sticker price in the last 7 days in the Cologne 2026 Major Shop.
- Added stickers showcase to the Cologne 2026 Major Hub tile on the main menu.

[b][u]MISC[/u][/b]
- Added multi-select functionality in Storage Units deposit/retrieve UI.
- Added appropriate error message when user's inventory is full and they try to redeem Weekly Care Package rewards, Armory items, or items in the Major Shop cart.
- Fixed number wrapping rules in some languages.[/quote]

Rumor has it:

- Size is ~140 MB (with Workshop Tools installed)