Victorian/Overbust- This style has no need for a front closure.  12 steel spiral bones precisely placed for support around the circumference.  The back closure is made up of 14 eyelets and lacing.

Historical- On this style the front closure has a metal busk.  22 steel spiral bones precisely placed for support around the circumference.  The back closure is made up of 30 eyelets and lacing.

Edwardian/Underbust- This style the front closure has a metal busk. 24 steel spiral bones precisely placed for support around the circumference.  The back closure is made up of 22 eyelets and lacing.

Front Lace-Up- This style has 22 eyelets and lacing in the front for closure.  12 steel spiral bones precisely placed for support around the circumference.  There is no need for a back closure.