Change font type for drop down list

Hello,

Just a brief one (hopefully); the drop down sort list currently displays in Times Roman. The rest of the site is not. How do I change this to inherit the sites’ font, or just change to the old faithful Helvetica/Arial?

Thnaks in advance,
Grace

Testing… http://loveanais.com/shop

https://wordpress.org/plugins/woocommerce-grid-list-toggle/