Pro Design & Fabrication of Custom Costumes & Props

Seattle, Washington

Buyers are raving!

This shop got multiple 5-star reviews in the past 7 days.



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Will James

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Will James


Average item review
5 out of 5 stars
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Quality 53 Shipping 47 Customer service 42

About SionnachStudios

Sales 3,355
On Etsy since 2016

Sionnach Studios is the combined effort between Billythebrick Cosplay and The Feathered Hart Costumes!

We have found that we tend to work together on most of our commission projects, and so creating a single name under which to operate was the next logical step. All commission projects and film work will happen here, moving through the studio, with more personal projects appearing on our individual pages. This has been a long standing goal for both of us, and we are beyond excited to see it coming together.

The Feathered Hart (Heather)

Heather has been making with her hands since she was 8 years old. Anything her mom or other relatives put in front of her was fair game--sewing, crochet, knitting, hook rugs, coloring, painting, pottery, sculpture, and so many more. She tried so many things and enjoyed all of them immensely. As she got older and had the freedom to explore more mediums she’d never dared to try in the past, she realized how much she loved making costumes and props because it requires so many skill sets, constantly drives her to continue learning, and has helped give her the confidence to be herself.

She began this with the intent of sharing her passion for creating and her making adventures with the community and she hopes to encourage others to create their own art adventure.

Billythebrick Cosplay (Will)

Will has been cosplaying and making his own props for about the better part of a decade, but after losing his IT job several years ago, decided to try to make this hobby into something a lot more. He does everything from sewing and pattern making to foamsmithing, mold making and casting, 3D model design and printing, and more.

Will has placed in several costume and prop contests as well as judged multiple contests. Will also frequently hosts and participates in cosplay related panels at conventions.

Will has also worked on a full-length feature film, Prospect and now has an IMDB Page. 

Shop members

  • Will James

    Owner, Creator, Designer

    Will is a cosplayer as well as a prop, costume, and set designer and builder.

  • The Feathered Hart

    Creator, Designer, Owner

Production partners

  • Allen Amis Creations

    Seattle, WA

    Allen Amis Creations produces the mold and resin kits for some of the items in my store based on my model and master.

  • Downen Creative Studios

    Portland, OR

    Beverly of Downen Creative Studios was a contributor to the pattern design for the Amazon Goddess patterns in our shop. Heather and Beverly formerly co-owned a company called Epoch Echo Cosworx in which they both designed and created patterns.

  • The Feathered Hart

    Seattle, WA

    Thea Feathered Hart works with me to make patterns, sewing kits, and finished commissions as half of Sionnach Studios

Shop policies