Sydney Boutique & Brisbane Showroom | Book Your Styling Consultation
Sydney Boutique & Brisbane Showroom | Book Your Styling Consultation
Sydney Boutique & Brisbane Showroom | Book Your Styling Consultation
Sydney Boutique & Brisbane Showroom | Book Your Styling Consultation
Skip to content

Plus Size Formal & Prom Dresses

Plus Size Formal & Prom Dresses for Every Special Occasion

Discover plus size formal and prom dresses designed for curves, confidence and unforgettable entrances. Every style in this collection is available in at least 2XL, while selected made-to-order gowns extend up to 9XL. Whether you're shopping for a school formal in Australia, prom in the USA, a black-tie wedding, gala, pageant or special evening event, explore statement gowns in satin, sequins, beading, stretch jersey and other premium fabrics.

Choose from fitted mermaid silhouettes, elegant A-line gowns, structured corset dresses, long-sleeve designs and glamorous floor-length styles. Alamour's extended sizing ranges from approximately AU size 16 to AU size 30 and US size 12 to US size 26 across selected designs. Available sizes vary by gown, so always check the individual product page and compare your bust, waist and hip measurements with our Size Guide.

Plus Size Prom Dresses for the USA & Formal Dresses for Australia

In Australia, the occasion is often called a school formal or Year 12 formal. In the United States, it is most commonly called prom. Wherever you are celebrating, Alamour brings both searches together in one size-inclusive collection of luxury formal dresses and evening gowns.

Australian customers can shop in AUD with local dispatch and express delivery options, while customers in the United States can shop in USD and select tracked international express shipping. Alamour also ships to Canada, New Zealand, the United Kingdom, Europe and many other destinations worldwide. View current services and delivery estimates on our Shipping Information page.

Alamour Plus Size Conversion Guide: AU, US, EU & UK Sizes

Alamour products use universal alpha-size variants such as 2XL, 3XL and 4XL. Use the conversion table below to understand the corresponding Australian, United States, European and United Kingdom numerical sizes.

Alamour Size AUS US EU UK
2XL 16 12 44 16
3XL 18 14 46 18
4XL 20 16 48 20
5XL 22 18 50 22
6XL 24 20 52 24
7XL 26 22 54 26
8XL 28 24 56 28
9XL 30 26 58 30

Important: Numerical sizing is not standardised across fashion brands. The same size number means something different in Australia and the United States. For example, an Australian size 16 is Alamour 2XL, while a US size 16 is Alamour 4XL. Always select your Alamour size using your body measurements rather than relying only on the size you normally purchase elsewhere.

Why Choose Alamour for Your Plus Size Formal Dress?

  • More choice in extended sizes: Discover a broad selection of fashion-forward formal and prom gowns rather than a limited edit of basic plus size designs.
  • Selected gowns up to 9XL: Many Alamour made-to-order styles are available through AU size 30 and US size 26.
  • Made-to-order availability: Selected gowns are created after your order is placed, allowing Alamour to offer more styles, colours and extended sizes while reducing unnecessary overproduction.
  • Customisable designs: Depending on the gown, approved customisations may include a different colour, neckline, back design, sleeves, slit placement or additional length. Additional charges may apply.
  • Detailed fit information: Product pages include fabric, stretch, construction, model measurements and individual fit notes to help you make a more informed choice.
  • Personal sizing support: Alamour's styling team can review your bust, waist and hip measurements and assist with selecting the most suitable size before you order.
  • Worldwide express shipping: Tracked delivery options are available throughout Australia, the United States and many other international destinations.
  • Buy now, pay later: Eligible customers can access options including Afterpay, Klarna and more, depending on their country and checkout eligibility.
  • Australian try-on locations: Customers can visit Alamour's Sydney Paddington Boutique or arrange an appointment at the Brisbane Showroom.

Find a Plus Size Gown That Suits Your Style

Create a striking entrance in a structured corset prom dress, discover intricate hand-finished details in our beaded dresses and gowns, or explore our complete edit of luxury evening dresses and formal gowns.

For greater flexibility, browse our customisable made-to-order gowns. Selected designs can be produced in alternative colours and may allow approved changes to the neckline, back, length or other design details. Customisation availability depends on the individual gown and should be confirmed with the Alamour team before placing your order.

Plus Size Formal & Prom Dress FAQs

What size is 2XL in Australia and the USA? +

In Alamour's conversion guide, 2XL corresponds approximately to an Australian size 16 and a United States size 12. Because sizing differs between brands, compare your bust, waist and hip measurements with the Alamour Size Guide before ordering.

What Alamour size should I choose for an Australian size 16? +

An Australian size 16 corresponds to Alamour 2XL. Do not confuse this with a US size 16, which corresponds to Alamour 4XL.

Are all Alamour plus size dresses available up to 9XL? +

No. Every dress in this collection is available in at least 2XL, but only selected made-to-order designs extend through 3XL, 4XL, 5XL, 6XL, 7XL, 8XL and 9XL. Check the size variants shown on each product page before ordering.

How do I choose the correct plus size formal dress? +

Measure the fullest part of your bust, the smallest part of your waist and the widest part of your hips. Compare all three measurements with the Size Guide and pay attention to the product's fabric and stretch information. If your measurements fall across different sizes, select the size needed for the largest measurement and seek advice from Alamour's styling team.

Which formal dress styles are best for plus size figures? +

The best silhouette depends on your measurements, comfort and personal style. A-line gowns offer movement through the skirt, corset gowns provide a structured shape, stretch jersey follows the body comfortably, and mermaid gowns create a dramatic fitted silhouette. Choose the design that makes you feel most confident.

Can I customise a plus size gown? +

Selected made-to-order gowns can be customised for an additional fee. Depending on the design, options may include changing the colour, neckline, back, sleeves, slit or gown length. Contact Alamour before ordering to confirm what can be changed on your chosen style.

How early should I order a made-to-order prom or formal dress? +

Order as early as possible before your event. Made-to-order gowns require production time before dispatch, and you should also allow time for international delivery and any minor alterations. Check the estimated production date shown on the individual product page before purchasing.

Does Alamour ship plus size prom dresses to the USA? +

Yes. Alamour ships to the United States with tracked express delivery options. Customers can select the United States region to view eligible products and prices in USD. Production time for made-to-order gowns is separate from delivery time.

Can I return a plus size formal or prom dress? +

Eligible in-stock items may be returned in accordance with Alamour's current Returns Policy. Made-to-order and customised gowns are produced specifically for the customer and are generally non-returnable, except where required by applicable consumer law. Review the product details and return conditions before purchasing.