Currently, you can’t add hover boxes to repeaters, which is a shame, because repeaters and hover boxes are a great combination for designing team pages. Currently, you have to use columns which don’t resize well. See video below:
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Thank you for this #FeatureRequest! 
Or alternatively, the option to make boxes and hover boxes full width, which will be able adapt to the size of the column (responsive). See image below (green button):
Maybe this should be a separate feature request?
I just did this same thing last night and thought of adding this request. Thank you for submitting it!
@roma Thank you. I eventually had to settle for using columns and shortening the width of each box to fit within the column gridlines. It doesn’t look as good as full width boxes but it doesn’t look that bad either. See images below, I hope this helps:)
