Great White Shark Motivational Marinelife Postcard Great White Shark Motivational Marinelife Postcard £1.50 Out of stock. The card is a print of an original watercolour of a shark saying "You're doing GREAT!". Ideal for people who need a virtual hug or motivation. A6 (approx. 148mm x 105mm) heavy stock card printed in full colour.Each design is illustrated by myself, before being printed and by a professional printer in the UK but colours may vary from those on screen due to different monitor set-ups.