Earlier this year I wondered how many KB is "normal" for a web font file size (spoiler 20-ish KB). I finished the post questioning how much subsetting really helps, meaning how much do you save from painstakingly choosing which characters should stay in the subset as opposed to just broad strokes (A| phpied.com
TL;DR: If your font file is significantly larger than 20K you may ask yourself "How did I get here?".For images I think we (web developers) have a sense of how many bytes we can expect an image we see on a page to be. A JPEG photo? 100-ish K is ok for a decent quality. Less is nice. How about 200K?| phpied.com