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In our book, snail mail will never go out of style. There’s something special about opening the mailbox to find personally addressed letters, invitations, thank-you notes, or greeting cards. Letter writing may be old-fashioned, but handwritten correspondences are always worth the extra effort (especially when penned on pretty stationery).

For sloppy scribblers like me, addressing the envelope can be the most stress-inducing part of the process. Penning the recipient’s name and address in perfectly straight, evenly spaced rows is nearly impossible—no matter how slowly I write each letter and number, the lines will inevitably slope up toward the stamp. When I admire the beautifully calligraphed invitations or cards that come to my mailbox, I wish my envelopes could have as impressive of a delivery.

Leave it Amazon to carry a simple solution for this common problem. The OPount Envelope Addressing Stencil is a tool every letter writer will want to add to their pencil pouch. Though some stationery accessories are pricey, this budget-friendly product is only $8 (BUY IT: OPount Envelope Addressing Stencil, $8; amazon.com). The kit comes with a set of four translucent plastic stencils. Each offers a different template to fit various sizes of envelopes. Use the templates to write tidy addresses with standardized lines for a presentation that’s as pretty as the stationery it's on. The stencils can work for any occasion, from Christmas cards and wedding invitations to everyday letters.

Happy customers on Amazon say they’ve ditched their rulers and turned to this easy-to-use product for addressing envelopes in an orderly fashion. One reviewer wrote, “I bought these to help write wedding invites. The varying sizes were awesome! I could use them on larger envelops (the thank you cards) and smaller envelops (the wedding invites).” Another reviewer offered helpful advice for keeping the stencils in place while writing: “Tip: If you don’t want them to move on your envelope, try placing a piece of tape on the top and bottom of the template.”

Stressed stationers can now breathe a sigh of relief with envelopes that will be (ad)dressed to impress.