In reality, these illustrations are not much bigger than a large sized postage stamp (approximately 4cm) but they caught my eye nonetheless! They are the work of Polish born artist Wojtek Siudmak, a regular contributor to Plexus, the bimonthly French erotic magazine which ran from April 1966 - June 1970, several colourway/design variations of the illustrations were used in the news, reviews & events section of the publication throughout 1969/70. You can view some more examples in one of my previous posts here.
All images scanned by Sweet Jane from Plexus Issue No. 28 October 1969 & Plexus Issue No.25 June 1969. All illustrations by Wojtek Siudmak.