Change font size of product card

Topic summary

A user successfully added a custom metafield and color to their product card but wants to adjust the font size and letter spacing to match their existing “captions” block styling (smaller font with more letter spacing).

Current styling goal:

  • Font size: 1rem
  • Letter spacing: 0.07rem
  • Line height: calc(1 + 0.7 / var(–font-body-scale))

Proposed solutions:

Two community members suggested similar approaches:

  • Navigate to Shopify > Themes > Customize
  • Select the “default product” template
  • Click on the text element to adjust
  • Access the Custom CSS section (found in Theme Settings or at the bottom corner)
  • Add custom CSS code to apply the desired styling

Screenshots were shared showing the current product card appearance and where to locate CSS customization options. The discussion remains open as the original poster hasn’t confirmed whether the suggested solutions worked.

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

Hi,

I’ve managed to get colour and a custom metafield appear in my product card, but i want the font size / spacing to be the same as my “captions” block - basically smaller and more letter spacing.

from what i can find this is the tweaks, but how can i apply it to this line?

.caption {
font-size: 1rem;
letter-spacing: 0.07rem;
line-height: calc(1 + 0.7 / var(–font-body-scale));
}

https://lc78eud3twhc8whk-57326960695.shopifypreview.com

Hi @letsgetwasted ,

Could you try going to: Shopify > Themes > Customize. There select the “default product” template. Next, navigate to the text you would like to adjust and click on it. On the right corned of the page, there should be a “Custom CSS” section, where you should be able to add your custom CSS code.

Hi @letsgetwasted

To complete your requests, please follow these steps:

  1. Go to Shopify Admin > Online Store > Theme > Customize > Theme Settings > Custom CSS https://prnt.sc/i8ljAMlHJUKl
  2. Paste the code provided into the Custom CSS section.
    I hope this helps

Best,

Daisy