Data Import Variant Item

I’m trying to perform a Data Import using Excel to create multiple variant items. For a single template item, I need to generate multiple variants based on attributes.
For example:

  • Attribute: Colour

  • Attribute Value: 02

  • Sizes: 06, 07, 08, 09, 10, 11

Basically this One template for One Size 06 Variant Item Should gets Created.

I need an Excel template format to import these variants correctly. I’ve tried creating one on my own, but I’m not fully confident.
If anyone has done this before, please share a sample template.