6 salons in Boulder, CO list lash extensions on their own website or menu. Too few Boulder menus list a price to give a local figure; across Colorado the median for a full set of lash extensions is $150 (based on 123 salon menus).
The median starting price for a full set across Colorado is $150 (based on 123 salon menus), and fills are typically $70 across Colorado (based on 97 salon menus). Prices come from salon menus and can change. See lash extensions cost.
Classic, hybrid or volume?
Classic sets place one extension on each natural lash for a mascara-like look. Volume sets fan several finer extensions onto each lash for a fuller look. Hybrid mixes the two. Salons price them differently, usually in that order.