# 10 Blue Envelopes-Business Regular Envelopes-#10 4 1/8 x 1 1/2-(Pkg of 55) (Blue) Size #10 Regular 4 1/8 x 9 1/2.Color Blue wove envelope 10 Regular Colored envelopes are ideal for most business documents sent daily to customers and vendors such as letters, invoices, statements and much more Envelope has Moisture activated gummed seal All purpose envelope for the home or the office 55 Pack