Estimates out, payments back
A #10 carries the estimate or the invoice, and a 9" × 12" catalog envelope carries the contract or a job folder, with the same corner, so every piece looks like one company. Window versions keep the design above the window for invoices printed with the customer's address.
The license line
Several counties around New York City ask home improvement contractors to show their license number in advertising, and many contractors carry it on every printed piece. The templates leave a short line for it under the address; change it to your number or delete it.
From the shop: Send estimates in a window #10: the customer's address prints once, on the estimate, and shows through.