SIR. | Separates, Intimates and Ready-to-wear – SIR the Label AU Explore signature SIR. style. Open back dresses, knitted separates and structured tailoring. At home with SIR. sweats or beach side with SIR. swim. Women’s Australian Designer. Receive 10% off your first order with SIR. Free shipping worldwide and a range of easy payment methods including GooglePay, Paypal, Afterpay.