The size of the envelopes included in the Avery Products pack #8316 (as well as #3378 and #3265) is 5 3/4" x 8 3/4".
The 5.75 x 8.75-inch envelope is commonly known as an A9 envelope or a Half-Letter envelope.
Envelope Size for 8316, 3378, 3265 Greeting Cards
Applies To
3265, 3378, 8316, Half-Fold Greeting Cards, Envelopes
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