Flat Bootstrap3 default buttons

Top
.btn-lg
.btn
.btn-sm
.btn-xs
Disabled

Fancy Fancy buttons with gradient

Top
.btn-lg
.btn
.btn-sm
.btn-xs
Disabled

Edge Bold & strong

Top
.btn-lg
.btn
.btn-sm
.btn-xs
Disabled

Round Round buttons

Top
.btn-lg
.btn
.btn-sm
.btn-xs
Disabled

Ghost Outlined

Top
.btn-lg
.btn
.btn-sm
.btn-xs
Disabled
Free Frontend