Here's a list of my favourite Made In Canada vendors that sell women's clothes. Please add your own!

• Birds of North America - Sizing to a 3XL or 20
• Brok Boys - Sizing to a 3XL or 20
• Central Standard - Sizing to a 2XL
• Harley Jae - Sizing to a 2/3XL
• Leka - Sizing to an XL
• Lights of All - Sizing to a 3XL, customization options
• Lustre - Sizing to a 4XL or 24, customization options
• Rightful Owner - Sizing to a 2XL
• Smash + Tess - Sizing to a 4XL
• Supayana - Sizing to a 3XL, customization options
• Ursa Minor - Sizing mostly to an XL, but there are some 2XL options

I also shop at Victoire Boutique in Ottawa quite a bit, and they've curated a wonderful list of Canadian designers.