Why is my size chart stuck at the bottom of my product pages?

Topic summary

A user’s size chart popup is malfunctioning on product pages—it appears stuck at the bottom of the website and cannot be closed, despite not having modified any CSS.

Diagnosis:

  • Initial troubleshooting revealed the size chart was hidden from view
  • After making it visible, further investigation identified the root cause as a JavaScript event processing error in the theme, not CSS
  • The “X” close button fails to trigger the proper event to dismiss the popup

Recommended Solution:

  • Contact the theme’s support team to address the JavaScript event handler issue
  • One participant shared a YouTube tutorial link for adding size charts to products as an alternative resource

Status: The issue remains unresolved, pending theme support intervention.

Summarized with AI on November 9. AI used: claude-sonnet-4-5-20250929.

Hello, I have a size chart on my product pages. It is supposed to open up as a simple pop up

But for some reason, my size chart is stuck at the bottom of my website and freezes. I can’t exit out of it at all, I have no idea as to what has happened. I haven’t customized the size chart with any css, and just need someone to point me in the right direction as far as fixing this issue.

Example of what is happening

https://2d26b3.myshopify.com/products/sample-product

PW: reishi

Hi @JhordanMSUITE ,

I can’t find the Size Chart on your product page. Looks like you’ve hidden it. I looked at the picture you sent and the problem may be caused by css. To check this issue, you need to turn on Size Chart so you can check.

Hello, I have made the size chart visible. Hopefully you are available to check this out for me once again. Thank you for your time

I have checked and this error does not come from CSS, this error is due to an error in your theme’s javascript event processing, which causes when clicking on the “x” sign to not close the Size chart. You can contact the theme’s support to recheck this error event.

Here is the solution to add size chart to products: