Please help identify these vintage cards
 

I have had these cards for a few years and have never paid much attention to them. I'm not a boxing expert so I was hoping someone could help me identify them. They are paper thin, almost like a stamp and measure about 2 1/4 x 1 1/2. Any help is appreciated.

I have 12 in total.

Nestle’ sports series stamps set, they are mid-30s. The boxers may be around 35-36, some of the specialized boxing folks may have a better date.

Thanks Justin, much appreciated.