What is the word(s) for someone who is very particular about the small details of something? [closed]

A pedantic person gives too much attention to formal rules or small details.

A meticulous person is very careful and pays great attention to every detail.

A fastidious person gives too much attention to small details and wants everything to be correct and perfect.

Persnickety!

a : fussy about small details

He lacked the patience to deal with such persnickety tasks as hanging wallpaper.

nitpicker if you want the connotation of overly perfectionist

The closest word I can think of is

punctilious
adjective
showing great attention to detail or correct behavior: he was punctilious in providing every amenity for his guests.
_NOAD

A punctilious person is one who lets no detail of a task or enterprise escape scrutiny and correction.