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Size guide
All styles are designed to fit true to size unless otherwise stated.
cm
inch
| SIZE | AUS | US | UK | ||
| XXS | 4 | 0 | 4 | ||
| XS | 6 | 2 | 6 | ||
| S | 8 | 4 | 8 | ||
| M | 10 | 6 | 10 | ||
| L | 12 | 8 | 12 | ||
| XL | 14 | 10 | 14 | ||
| XXL | 16 | 12 | 16 | ||
| 3XL | 18 | 14 | 18 | ||
| 4XL | 20 | 16 | 20 | ||
| 5XL | 22 | 18 | 22 |
Please note: Billy J sells many brands / labels. If you would like further assistance with sizing, our customer service team are more than happy to help! Please contact us here
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US Policy:
Within 30 Days: Store Credit
Alternate Bridal Policy:
Order 3 or more dresses from our Bridesmaid collection in one transaction, return for a full refund within 30 days of delivery (postage excluded).
Click here for further information on our Alternate Bridal Policy.
Please note: Items marked as "Final Sale" remain subject to our standard Final Sale policy and cannot be returned or exchanged.
For all information regarding our returns policy, please visit -www.billyj.com.au/pages/returns
Billy J's warehouse is based in Queensland, Australia. Please see shipping information below:
US Orders
3-5 BUSINESS DAYS EXPRESS
Free express shipping to the US on orders over $200 USD.
$15 USD for orders to the US under $200 USD.
Prices inclusive of Duties. Taxes calculated at checkout.
Billy J delivers internationally. For more info on delivery locations click here.
Please note: Express Shipping timeframes do not take into account the packing time at our warehouse. Typically we dispatch within 1-2 business days.
Overall rating: 4.915254 / 5 from 118 reviews.
The Sia Maxi Dress is celebrated for its elegant design and practical features, including a high neckline, adjustable straps, and an invisible side zip. Customers appreciate its true-to-size fit, high-quality material, and beautiful color, making it a versatile choice for various occasions.
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"This dress was perfect for the wedding I got it for. I’ll definitely keep this in my rotation for future weddings, gorgeous butter yellow, very flattering, I loved the feature that snatches waist as much or little as you adjust it to. 10/10 quality"
"I ordered several dresses and they’re all absolutely lovely! They fit well, even in terms of length, even though I’m quite short (1m57). The fabric of this dress is pretty and comfortable to wear."
"I wore this dress to a wedding and got so many compliments. The backless part is so flattering and the tightness is adjustable! The color is also very pretty. I am 5’1, 118lbs and got a size 4. Used some hemming tape so it was easy to shorten the length."
"Adored this dress, fit perfectly and the most gorgeous colour"
"Loved. The adjustable straps help with making it fit perfectly."
"Stunning! Love the colour. No notes."
"Adored this dress, fit perfectly and the most gorgeous colour"
"This dress is absolutely gorgeous. The butter yellow color is the perfect balance of bold and unique, yet elegant and classy. Luckily it fit like a glove right out of the package for me. I love the beautiful open-back and the subtle mermaid style bottom. I've had such good luck with Billy J dresses in general - it has become my tried & true place to shop for wedding guest dresses and other semi-formal/formal events. This dress was yet another success story for me and I'm so excited to wear it!"
"This dress is absolutely gorgeous. The butter yellow color is the perfect balance of bold and unique, yet elegant and classy. Luckily it fit like a glove right out of the package for me. I love the beautiful open-back and the subtle mermaid style bottom. I've had such good luck with Billy J dresses in general - it has become my tried & true place to shop for wedding guest dresses and other semi-formal/formal events. This dress was yet another success story for me and I'm so excited to wear it!"
"Love! Bought for a wedding, not alterations needed. Exactly as pictured"
