Is there like an option to have 2 different prices for one item

Excample. $23.40 500grams *AddCart* 
                    $43.00              1kg *AddCart*

Like the "Red" one may cost $25, the blue one $34, but its the same item,

I am selling things like dried herbs, I need to sell the same item, in 500gram lot, 1kg lot, etc

Is there any options for this?

Thanks!