I've not seen the silver Trans-Continental Relay Race Yellow Fellow medal before but based on the design and similar bicycle race medals of the period, it is likely approximately half dollar to silver dollar size in diameter. The term "Yellow Fellow" for this 1896 medal is undoubtedly related to the exceedingly popular 1896 Sunday newspaper cartoon adventures of the Yellow Kid, a Chinese caricature of an Oriental boy in a yellow tunic. Bicycle relay race medals and badges of all sorts were very popular in the 1880-90's period.

Yellow Fellow was a bicycle - not person. Manufactured by E.C. Stearns, Syracuse, NY. The auction link below shows the 1896 relay race medal with top bar and ribbon. It says the medal is silvered over white metal - not sterling silver. Made by Wallace Co. Wallingford, CT, which did manufacture sterling and plated silver flatware etc.

The bicycle was probably named after the popular comic strip.

2-7/8" tall silvered white metal by The Wallace Co. Ornate top bar reads "Examiner Journal Yellow Fellow." Displays spread-winged eagle on bicycle crossbar. Medallion below reads "Yellow Fellow" and shows sunburst with bicycle rider passing a baton to second rider. Reverse rim reads "Journal Examiner Trans-Continental Relay Rider." Center with hand-engraved name reads "Presented To L. Enderuck Trans-Continental Relay Rider By The Journal New York/The Examiner San Francisco 1896." Our research shows only 220 riders who rode 15 mile sectors averaging 11mph between S.F. and NYC in 13 days. First seen. Rare & NM.