Split by attribute
Your product, for instance, has 2 attributes : ‘Size’ and ‘Color’, you can choose one of them and plugin creates separate products based on these 2 attributes.
Go to Product you want to split -> Click 'Split variants':
Select attribute you want your product to be split by:
If you split by Color you will end up with 14 products of one size (based on Color attribute). The name of the attribute you used for split will be added to your product’s title.