Up&Up Security Envelopes Size 10 White Gummed Seal 125 Count 4.125 x 9.5 Inch Up&Up Number 10 security envelopes provide privacy for personal and business correspondence with a specialized security lining that prevents contents from being visible through the paper. These white business envelopes feature a standard gummed seal for secure closure. Each envelope measures 4-1/8 by 9-1/2 inches, making them the ideal size for standard letter-sized documents folded into thirds. This 125-count pack ensures you have a reliable supply for mailing bills, checks, or sensitive documents. Measurements: • Envelope Size: 4.125in x 9.5in • Count: 125 Envelopes #Minimalist