6+girls tag means that the number of girls exceeds number five (it means 6 or more). So a post, especially with a crowd of girls above five (5), like 6,7,8,9 etcetera, should be described with this tag.
the 6+tag is designed to avoid tag like "647girls" (...)
Top 10 Best Anime Girls of 2015
Hai to Gensou no Grimgar “Has Oppai!”
Picking Up Japan Express Vol. 36 Worth a Pickup
Delectable Dizzy Cosplay by Lechat
Dimension W Out Of This World
