Check boxes alongside orders

[Onstar]

Hi,

 

I sell products that have different sizes, but the same color. Our customers sometimes purchase different sizes of the same products, but they have to click on "buy now" and then go back and click again for the next product.

 

Is there a contribution that will display products images with a check box so that customers can select multiple products at once and add to cart at once.

 

Or, can someone give me a help with the cold.

 

I really don't know anything about php and programming.

 

Any help at all will be appreciated.

 

Thanks