Size Regular/medium * Fits Length 13.25-15.75 / 29 - 40cm * The Form Fit Shoulder Brace Is Designed To Provide Immobilization Following Shoulder Injury/surgery * With Its Streamlined Fit Sporty Look And Breathability It Offers Excellent Comfort And Ease Of Use * Same As Its Predecessor The Smartsling The Form Fit Shoulder Brace Also Provides Abduction Of The Shoulder (when The Abduction Pillow Is Attached) Or External Rotation Of The Shoulder (when The External Rotation Pillow Is Attached) * Optional Axilla Pillow (#ssaxp) Helps Distribute Weight Over A Larger Surface Area And Decreases Pressure On The Ulnar Nerve