How to make Sub-text in Pop Up Bigger in Shopify Symmetry Theme?

[baldeepdhurkot]

Hi Friends

I'm looking for someone to help me with some Popup sub-text in a Shopify Theme Symmetry. I'm looking forward to making it bigger, I know it's just a small task but it's gonna tale long for me because I'm really not into it. SO Please see the image below for reference. 

Sub-text

Thank You!

Baldeep

[Zworthkey]

Hii, @baldeepdhurkot 
Kindly share your store URL so,
I can solve it perfectly.
Thank You.