get size of product from tag li without checkbox when submit add to cart

[eluser]Bart v B[/eluser]
I don't understand your problem.
Within the cart you can set the options right?
So in the array you make something like:

Code:

<?php
$data = array(
               'id'      => 'sku_123ABC',
               'qty'     => 1,
               'price'   => 39.95,
               'name'    => 'T-Shirt',
               'options' => $this->input->post('size')
            );