The round circular ring often associated with depictions of angels.
Traditional halos should be simple solid rings, with no protrusions or extra details. Damaged or broken halos still count if they adhere to these standards. Do not tag fake or mechanical halos.
Examples: post #3863748 post #3862633 post #3094233 post #4769414 post #7051367 post #2497686 post #1679374 post #7067585
For when the halo is also glowing see glowing_halo which may or may not also be a traditional halo.
This tag implicates halo (learn more).