Size chart button

[Tinctoria]

How do i add a size chart button to each product on my website? (note: i have a common size chart for every product on my site).

Site link: https://0a272e-93.myshopify.com/ 

Also, I already created a size chart page with the size chart inputed in it.

[WalkYourStyle]

All you have to do is to go to your theme's customization and in the default product template add a pop-up link and connect the size chart page to it. Then add a pop-up title and you are good to go.

[Tinctoria]

I am not sure how to add a pop-up link to the default product template

[WalkYourStyle]

What theme are you using?
1. Go to 'Online Store' -> Themes -> Customize

2. At the top-middle of the page, click on 'Home Page' -> Products - > Default Product

3. Then on the left side click on the Product Information Section under Template, and click on Add block and select Pop-up
4. Click on the pop-up you just added  and on the left side click on Select Page, and select the size chart page