How to change the size of my + and - buttons - Boost theme

Topic summary

A user encountered oversized plus (+) and minus (-) buttons when adding items to cart in a mix-and-match bundle on their Shopify store using the Boost theme. The buttons appeared abnormally large, disrupting the page layout.

Problem Details:

  • Initial attempts to fix by changing CSS from “flex” to “block” with set height/width were unsuccessful
  • The buttons originated from an app integration, requiring custom code solution

Solution Provided:
A custom CSS code snippet was shared to be added in theme.liquid above the </body> tag. This code targets the app-generated buttons and constrains their size.

Outcome:

  • The solution successfully resolved the sizing issue
  • User confirmed the fix worked as intended
  • Thread marked as resolved
Summarized with AI on November 2. AI used: claude-sonnet-4-5-20250929.

Hello all,

I have this mix and match bundle im working on and when i add an item to cart it makes the + and - buttons huge.
is there a way to force a minimum width for these buttons?

page is Assorted minis – Raditive Prints

I have tried changing the size from “flex” to “block” with a height and width and

Do you want to like this?

YES EXACTLY!

Give me few minutes

awesome, thank you so much. Ive been pulling my hair out trying to figure it out.

Please add the below code in theme.liquid above


This button comes from app. so we can try by custom code. I hope this will be work for you.

Thank you

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you are my hero thank you

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Appreciate…If you want to any help then you feel free to message us.

Thank you

Please accept this solution if works for you