Hello, @Dionizio Find,
1. There are two possible ways for the size guide.
|. Global to complete site products
You can set it from XStore >> Theme Settings >> WooCommerce >> Single Product builder and set the sizing guide widget as per your requirements: https://ibb.co/pWkS1ZB
||. For Individual Product
You have to edit the particular product and scroll below, you will find [8Theme] product options and under it, you will find the sizing guide, you can set it from there for the individual product as per your requirements: https://ibb.co/y48mQSm
2. Yes, by default this is not possible, you can try with any third party plugin which better meets your requirements.
Regards 8Themes Team.















