Fall in love with our 2019 Autumn/Winter collection. The Opal PO706 is a mermaid silhouette, floor length, stretch sparkle formal, evening or prom dress available in sizes AU 4-30. Please contact your nearest stockist for pricing and availability.


Pink OmbrePink OmbreTwilightTwilight

The Opal Formal Dress PO706 by Tania Olsen Designs is a unique mermaid formal or prom dress. The Opal features a fitted bodice with a halter neckline, keyhole cutout detailing and spaghetti straps. The rear of the gown is equally as dazzling with a low back held by four thin straps. Turning again to the front of the dress, the waistline features a thin embellished belt which falls to a floor length fitted mermaid silhouette skirt with a train. This design is crafted with a sparkle jersey knit fabrication that is lightweight and gleams magnificently under the light. The Opal is a flattering style for a variety of shapes and sizes from petite to plus size and is available in sizes AU 4-30. There are two colour variations in this formal or evening dress: Pink ombre and twilight. 

Features of the Opal Formal Dress PO706:

  • Fitted bodice 
  • High neckline with keyhole cutout
  • Spaghetti straps
  • Open back with strap detail
  • Detachable belt
  • Fitted mermaid silhouette
  • Floor length skirt with train 
  • Stretch sparkle knit fabrication 
  • Inner bra cups
  • Low back zipper
  • Available in: Twilight, pink ombre 

All of our dresses are designed to be flattering for a variety of different body types, as most styles are available to order in sizes 4-30. To find your perfect fit, please contact your nearest Tania Olsen stockist for assistance with correct measurement and size selection.

For more formal dress inspiration, take a look at our Pinterest.

Additional information


Pink Ombre, Twilight

Parent Colour

Navy, Pink, Silver


Low, Open, Strappy


Sparkle Stretch Knit


Floor length


Halter neck, High neck


Fitted, Mermaid

Ordering Information

  • Allow approximately 16 weeks for ordering some colours and sizes. Check with your nearest stockists for styles available for immediate dispatch. – Click here for further information


  • Available to order from sizes 4-30
  • We recommend having your measurements taken to select your size from the Tania Olsen Size chart. Store samples should not be used to select a size as they can change shape over time with different body shapes trying them on.
  • Alterations may be required for a tailored fit.

Colour and Fabric

Colour’s displayed on your monitor may vary from the actual fabric colour. Please view a fabric swatch in person at your nearest Tania Olsen Stockist. Please note that each dye lot could vary up to 5% from the colour swatch shown in store and these should be used as a guide.