Set of 50
These are the typical sizes for an RSVP card or a thank you card envelope. 
 
A1 or 4 bar Envelope: 5.125x3.625 inches
A2 Envelope: 5.75x4.375 inches
 
Or want printed envelopes? 
 
We have a ton of other envelopes sizes, so if you need something else, please email us at info@theprettiestpixel.com with your request!