Custom Formalwear

Prom Dress Design Helsinki

Custom prom, ball, and formal dresses drafted to your body and designed to your style. Six to ten weeks lead time.

Custom prom dress design at Double Stitch by Sumu in Helsinki

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, that moves the way you want it to move, and that no one else has.

We design for prom, graduation, ball, and other formal events across Helsinki schools and communities. The first consultation is free.

What We Design and Sew

Prom and ball dresses in any silhouette (A-line, mermaid, ballgown, column)
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 750 euros
Typical range: 900 to 1,500 euros
Beaded or embellished designs: from 1,200 euros
Custom separates (bodice + skirt): from 850 euros

Fabric is priced separately, typically 30 to 160 euros 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.