Custom Formalwear
Prom Dress Design Helsinki
Custom prom dresses, graduation day dresses, ball gowns, and formal party dresses drafted to your body and designed to your style.
A prom dress should fit. It should be yours. And it should not look like a dress twelve other people are also wearing. Custom prom dresses from Double Stitch by Sumu are drafted from your measurements and designed with you from sketch to sewing. You get a dress that fits, moves the way you want it to move, and belongs only to you.
We design for prom, graduation day, school dances, ball nights, and other formal events across Helsinki schools and communities. If you are collecting prom dress ideas or graduation day custom dress ideas, bring them to the consultation. We help you turn inspiration into a dress that can actually be made and worn comfortably.
What We Design and Sew
- Prom and ball dresses in any silhouette (A-line, mermaid, ballgown, column)
- Graduation day dresses for ceremonies, photos, and evening parties
- Custom party dresses for school events, dinners, and formal celebrations
- Long formal gowns with or without train
- Short cocktail-length dresses
- Separates: bodice plus skirt in matching or contrasting fabric
- Custom linings and corsetry for support without visible shapewear
- Beading, embellishment, and lace detail where desired
- Custom back detail (low back, criss-cross, illusion) designed to your preference
- Heritage and cultural styling where relevant
How It Works
- Step 1
Free Consultation
Studio or video. We discuss the event, the look, and the fabric direction. Bring images and your date.
- Step 2
Design & Measurements
We sketch together, take measurements, and confirm a quote. Fabric sourcing begins immediately.
- Step 3
Muslin or First Fitting
Structured designs get a muslin fitting. Simpler designs go straight to a first full-fabric fitting at the halfway point.
- Step 4
Final Fitting & Delivery
Final fitting for fine-tuning. You leave with the finished dress, steamed and ready, one to two weeks before the event.
Pricing Guide
- Custom prom or formal dress
- from €600–700
- Beaded or embellished designs
- from €900
- Custom separates (bodice + skirt)
- from €700
Fabric is priced separately, typically €30 to €160 per meter. Beading, lace, and embellishment are quoted per project. First consultation is free.
Turnaround
- Six to ten weeks for most prom dresses.
- Book three months before prom when possible.
- Shorter timelines sometimes possible for simpler designs. Ask at consultation.
Frequently Asked Questions
When should I book a custom prom dress in Helsinki?
Three months before prom is ideal. Two months is workable for simpler designs. If prom is sooner, contact us. We keep some capacity for shorter timelines and will tell you honestly what is achievable.
Can we replicate a designer prom dress look?
We will not copy a specific copyrighted design, but we often work from inspiration images that capture the silhouette, neckline, or detail you love. Custom lets you adapt the look to your body and preferences.
What happens if my body changes between fittings?
Custom dresses are fitted in stages precisely to allow for body changes. We leave seam allowance and only finalize final fit at the last fitting. Tell us if changes happen and we adjust accordingly.
Do you design custom dresses for school dances and graduation?
Yes. Graduation dresses, school dance dresses, and end-of-year formal events are common projects. Shorter dresses typically have quicker turnarounds than full-length gowns.
Book Your Prom Consultation
Tell us your event date at the consultation. We will plan fittings backward from it.
Double Stitch by Sumu, Liisankatu 9 LH3, 00170 Helsinki
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