Custom Equestrian Shirt Design

I'm launching a specialized equestrian clothing brand focusing on made-to-measure shirts.

Customers should be able to customize the following aspects:
-chose from 3 different patterns that also include these different options (sketches of shirt options already drafted)
-shirt color
-collar colors
- Trim
- Buttons

Ideal skills and experience:
- Expertise in apparel design, especially for equestrian wear
- Strong knowledge of fabric and customization options
- Experience in made-to-measure clothing
- Ability to create a user-friendly customization interface

Looking for a detailed, creative, and functional design solution. Please include a portfolio with relevant work.