You will find that your business or personal mail can be more stylish and efficient. Our high-quality C4 envelopes for businesses cater to mailing documents up to A4 size without folding. It’s a great choice for official and personal use where quality is paramount. our C4 envelope packaging guarantees your mail to pop out in quality. The C4 envelope that holds A4 size allows you to send A4-sized documents unclasped, without folding. This way, your important papers will be intact when received.