Upload size charts onto shopify theme

Hello, I have a swimwear website and use shopify. We have recently updated some size charts for some of our products and need some help uploading the new ones into my theme on shopify. I have different size charts for different products, I think I have four size charts in total - size chart 1, size chart 2, size chart 3 and size chart 4. It is just size chart 2 I need to amend for our crochet bikinis. I have two images to upload for size chart 2 - one chart for bikini tops and one chart for bikini bottoms.

If I send you the images I wondered if you could please look at my shopify coding and update these size charts for me so they appear on the product page.

Thanks