[grace-baker Hexnode 30 December 2019 grace-baker Moderator]

Hai,

Thanks for posting the query!

Yes, you can customize the app icon size in kiosk mode. While setting up a single or multi-app kiosk policy, choose ‘Launcher’ under ‘Android Kiosk Mode’. Under Customizations, kindly enable ‘customize kiosk launcher’, and choose the ‘icon size’.
The ‘Icon size’ will have four options to choose from. If the option ‘custom’ is chosen, you can set the size of the icon manually.

Please use the link for reference on the same.

Cheers!
Grace Baker
Hexnode MDM