Classic Crest envelopes are some of the best in their class. ÊThey are dependable in quality, preformance and capatibility. ÊFSC certified, manufactured with 100% renewable green electricity and has a minimum of 30% post consumer recycle content. ÊA6 size envelope is 4 3/4″ x 6 1/2″, it fits a 4″ x 6″ sheet perfectly. ÊGreat size for an invitation or stationery.