In using a guitar amp, it's important to know how to manipulate the amplifier to achieve a number of different effects, including a clean or dirty sound. Learn about using the bass and treble knobs on an amp with help from a professional guitarist in this free video on guitar amps.
A 10 X 13 envelope (must be less than 1/4 inch thick) is considered a flat and costs 80 cents for the first ounce and 17 cents for each fractional ounce after that up to 13 ounces.
A standard mailing envelope is $0.40. Common invitation envelopes are sized in A2, A6, A7. A2 are small enough that you would use for your RSVP cards, A6 is mailing envelope that fits 4-3/8 x 6â³ size invitations, generally on the smaller size, and A7 fits the 5Ã7 size of invitation cards. How to cut cost on envelopes: