Great — here are places and practical tips to buy the yellow polka‑dot looks you see at Australian race events, with options that ship to the US.

Where to shop (Australia-based retailers that often carry racewear-style polka dots)

• THE ICONIC — big range of occasion dresses and local brands; good for race-day styles and headpiece matching. (smokeandmirrorsboutique.com.au)
• Myer and David Jones — department stores that stock occasionwear, millinery and established Australian designers. (dailytelegraph.com.au)
• PrettyLittleThing Australia / PLT — affordable, trending polka‑dot dresses and maxi styles. (PrettyLittleThing.com.au)
• Kmart Australia — viral, low‑cost satin/polka‑dot pieces that sell out quickly (good budget option). (news.com.au)
• Boutiques & independent labels (Rebecca Vallance, Gorman, Dangerfield, etc.) — for more distinctive or higher‑end race looks. (smokeandmirrorsboutique.com.au)
• Marketplaces and secondhand (Etsy, eBay Australia, Vinted, The RealReal) — vintage or hard‑to‑find polka dot pieces and Australian sellers who will ship internationally. (ebay.com.au)

US / international retailers with similar styles (faster shipping to the US)

• ASOS, Revolve, Nordstrom, Lulus, Anthropologie — search “yellow polka dot dress,” “yellow dot midi,” or “yellow polka dot skirt” for race‑day appropriate cuts.
• Etsy — independent makers and vintage sellers worldwide; good for custom colors/prints and matching accessories.

How to find the exact “race event” look

• Search keywords: “yellow polka dot dress”, “yellow polka dot midi”, “yellow polka dot tea dress”, “yellow polka dot millinery” or “racewear yellow polka dot”. Use filters for length (midi/maxi), sleeve type, and occasion.
• For hats/headpieces: search “fascinator”, “pillbox hat”, “races fascinator” + “yellow” or “polka dot”. Milliners often sell coordinating pieces.

Shipping and sizing tips for a US buyer

• Check whether Australian stores ship to the US and their return policy; some items (especially viral drops) sell out fast. Consider using international-friendly retailers (ASOS, Etsy, Lyst) if you need fast delivery. (lyst.com)
• Mind Australian sizing (AUS sizes often match UK sizes); review each store’s size chart and measurements.
• For customs: small clothing orders are usually low risk, but check the seller’s shipping terms and any import duties for higher‑value orders.

If you want, I can:

• Run a quick search right now for yellow polka‑dot dresses available to ship to the US (include price range and shipping estimates), or
• Pull a shortlist of 6–8 exact items (budget, mid, premium) from the retailers above.

Which would you prefer?