The tag alias #81915 mini_giantess -> invalid_tag is pending approval.
Reason: This has existed for 8 years now with multiple removals, but seemingly no attempt to salvage it with a wiki or anything like that.
Several affected posts have no obvious objects/people to compare height against.
small_head and similar work fine for posts where we're estimating a character's height based on their proportions.
macro works fine for characters who are visibly tall because of an obvious point of comparison.
larger_female works fine if a character is not truly "giant" but has a smaller partner to compare against.