Getting your Trinity Audio player ready...

Mailing items at the USPS is set to increase at the end of the month — it’s biggest in history.

First Class mail will increase from 50 cents to 55 cents, with additional ounces costing 15 cents.

USPS spokesperson Debbie Fetterly said that a 2-ounce stamped letter such as a typical wedding invitation would cost less to mail decreasing from 71 cents to 70 cents.

The 5-cent increase constitutes a 10-percent increase.

The increase is the third annual increase in a row.

Additional changes include:

• Letters (metered 1 ounce) increase to 50 cents from 47 cents.

• Outbound international letters (1 ounce) stays the same at $1.15.

• Domestic Postcards stay the same at 35 cents.

• Small flat rate box priority mail increases to $7.90 from $7.20;

• Medium flat rate box increases to $14.35 from $13.65;

• Large flat rate box increases to $19.95 from $18.90;

• APO/FPO large flat rate box increases to $18.45 from $17.40;

• Regular flat rate envelope increases to $7.35 from $6.70;

• Legal flat rate envelope increases to $7.65 from $7;

• Padded flat rate envelope increases from $8 from $7.25.