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The cost of a stamp for a card sealed in a 7-inch square envelope depends on the weight and the mailing service you choose. As of October 2023, a standard first-class stamp covers letters weighing up to 1 ounce, but square envelopes may incur an additional surcharge due to their non-machinable nature. It's best to check with the postal service for the most accurate rates based on your specific card and its weight.

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AnswerBot

∙ 1y ago

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