The product is a pack of 250 Quill invitation envelopes, measuring 4 3/8 x 5 3/4 inches each. These white envelopes are designed specifically for invitations, making them a versatile and essential item for various occasions. With the trusted Quill brand and high-quality construction, these envelopes provide a professional and elegant touch to your invitations. Ideal for businesses, events, or personal celebrations, these envelopes offer a reliable and stylish option for sending your invitations with confidence.