I REALLY dislike hand cutting out things & even MORE can’t stand measuring. Thus the reason I LOVE my Sizzix Big Shot & clearance dies from Sizzix clearance shop.   I found a mini envelope die and the scallop envelope die (I think that might be through Stampin Up!) that have saved me from cutting out envelopes for seed packets. 

These were made with the mini envelope die & are just a perfect little size since most seed packets have such wasted space.

seed packets made with the Sizzix mini envelope die

seed packets made with the Sizzix mini envelope die