nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Thumbnail Size

ebrays

Hi - does anyone know AGOL's new thumbnail sizing?

Since the June update last night the 600x400 pixel custom thumbnail templates I've made don't fit now and being a real pain trying to guess and get my thumbnails to fit properly. Can't find recent documentation on correct sizing. Or any advice.

Thanks!

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Accepted answers

StephanieW

Hi @ebrays this was documented as BUG-000177465: Following the ArcGIS Online June 2025 update, an item's thumbnail now defaults to 400 x 400 pixels when it used to be 600 x 400 pixels and is under review.

All comments

joyoung_kerrvilletx

The new ratio appears to be 400x400 pixels, so now all our thumbnail images have to be squares.

StephanieW

ebrays

Haha the answer was right in front of me! Thanks Joshua

ebrays

Thank you Stephanie

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