You will need to adjust the quantity if you want more than one item with the back personalized.
At checkout, please include the NAME/# for back and note which item you specifically want to add it to if you have multiple items. Be sure to include you email/phone number at checkout incase I need to contact you to confirm any details.
approx size: name 1.75"tall, number 7.5"tall on adult shirts. Size can vary pending shirt size