Login to your account via the 'Support' tab.
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Your most recent order will appear at the top and you can edit it as long as we haven't shipped it yet. On the right hand side, you'll see the ability to edit the shipping address as well as editing the order itself should you want to change size or color.

If you click the edit shipping address, you'll be able to update all of the shipping fields,

If you click on the edit order button, you can change the size or color of your purchase.

If you need assistance editing your order please let us know by emailing support@atoms.com