But to qualify for mailing at the First-Class Mail postcard price, it must be: 1  Rectangular. 2  At least 3-1/2 inches high x 5 inches long x 0.007 inch thick. 3  No more than 4-1/4 inches high x 6 inches long x 0.016 inches thick.
eligible - qualified for or allowed or worthy of being chosen; eligible to run for office; eligible for retirement benefits; an eligible bachelor. qualified - meeting the proper standards and requirements and training for an office or position or task; many qualified applicants for the job.
FERS Information Eligibility. Eligibility is determined by your age and number of years of creditable service. In some cases, you must have reached the Minimum Retirement Age (MRA) to receive retirement benefits. Use the following chart to figure your Minimum Retirement Age.