Good Morning: My grandson's 1995 Nissan Maxima trunk liner (sides and bottom) is missing a bunch of the trunk grey retainer clips. I can't seem to determine what to buy - dimension, size(s), etc. Thanks in advance for your guidance and adult supervision.

 

Go to your local auto part store, something like this would do:
http://www.autozone.com/screws-pins-...?checkfit=true

 

http://www.courtesyparts.com/nissan/...rim-panel-clip

 

junkyard