How to add custom product badge like Sale badge on Yuva theme?

[chacha420]

I am trying to add a custom badge on my product card to show available sizes just like the sale badge. 

Here is my shop page 

Third party theme: Yuva theme

[SAN_MSWEB]

Hi @chacha420 

I hope you are doing good and welcome to the Shopify Community!
I am San from MS Web Designer.

You can use this app- 
https://apps.shopify.com/variant-swatch-king 

Regards,

San

[BSS-Commerce]

Hi @chacha420 

We checked your needs and would like to suggest you use Product Labels & Badges app. This app lets you create a custom badge to show the inventory badge. 

Please go to the app > Click on Add new badge > Choose Custom Text Badge > Choose a variable named {inventory} or {inventory_quantity} > Choose the applied products.

These will help you show available sizes for your products. Also, this feature is available for all users, including those on our free plan.

We hope it will help you!