How to increase the font size?

Can someone tell me how can i increase the font size of radio options? Im using latex for label and its working but isnt working for its options.

spend_type = st.radio(r'$\textrm{\large Choose Spend Type}$', options=spend_type_list, horizontal=True)

It does work for me. Maybe your spend_type_list is wrong?
Screenshot From 2025-07-01 16-42-44

Hi, can you elaborate on that please. I’m defining the list as
spend_type_list=["Only Total Spend/Revenue"] or as
spend_type_list=[“Only Total Spend/Revenue”, “Total Spend + Lock Budget by Period” ] depending on a condition

So you are using latex in the label but not in the options. That is why it is working for the label but it is not working for the options. Try using latex in both places.