Flat Matter Lashes are made from the finest quality material. Light blue thin 2mm glue tape is slightly sticky and makes fanning super easy and quick. Every batch of lashes are checked for even gaps in lash lengths and curl to create the perfect lash line. Ruthie Belle Flat Lash clings instantly to the natural lash making application with this lash super fast & easy!!! The diameter is a .15 with the feel & softness of a .07 with the look of a .25 at the base to give a beautiful dark deep lash line clients will absolutely LOVE!! They are a flat instead of the normal round so the base looks wider then the normal .15 regular lash extension and they cling instantly to the natural lash having more of the lash extension adhering to the natural lash makes these flat lashes stay/hold retention better then the regular lash extension.