I want to copy a website page to my shopify page

I want to copy a website to my shopify page,the website page is size chart,I want to copy the two size chart page to my shopify page,one it here: https://www.stacees.com/size-chart two is this: https://www.stacees.com/products/empire-a-line-halter-sleeveless-chiffon-long-floor-length-bridesmaid-dress-S22015XYB , I show it in the picture