Gum soles are having a moment with this favorite style from Gola.  Grandslam has a vintage tennis styling, here in a mix of leather and suede with a flash of lavender at the heel. 

Gola sizing is listed in US/Euro sizes as in US6/37, US7/38 and so on.  It is listed for our sizing purposes in US sizing.  We find that if you plan to wear them with a sock, they fit true to size.  If between sizes consider sizing down.