The word "shou" is best written in golden red, with a size of four feet. Red represents happiness and also indicates grandma's longevity! If you sign, you can write something like "happiness and longevity, good luck and peace" under the word "longevity", or you can write it on the left. Simple and generous. Just set it with beige Zi Ling.
"Endeavour" can be written as a three-foot white propaganda with a better framework.
Humble opinion, laugh!