I've made a 255 character text area before. I'll see if I can find the code. If so, I'll add it to the File Upload contribution.
Basically, you need to change the option value name field in customers_basket_attributes and orders_products_attributes to be varchar(255) and add an option type for text areas.
Text Area Product Attribute?
in General Add-Ons Support
Posted
I've made a 255 character text area before. I'll see if I can find the code. If so, I'll add it to the File Upload contribution.
Basically, you need to change the option value name field in customers_basket_attributes and orders_products_attributes to be varchar(255) and add an option type for text areas.
Hth,
Matt