I stock Valdani size 12 perle cotton in various colors to go with my patterns.  When ordering, please specify the number of balls of perle cotton that you are ordering in your CART prior to checkout.  Then, add a note with the color (by letter and number, ie. O539 (Variegated Evergreen), or 3 (White)) that you wish to order prior to checking out.  If a particular color is out of stock at the time you place your order, i will contact you to see if you would like for me to send a different color number or refund the purchase price of the unavailable item. 
Please note that the price of each ball of perle cotton is $5.50.