Thanks for the dimensions a all the photos.
This is a very decorative traditional Chinese ginger jar, with its moths and flowers on a hand-painted cobalt blue ground, the moths arranged to make a pleasing geometric pattern, and encircling peony blossoms or mudan, powerful symbols in the East of wealth, happiness and eternal beauty.
However it's not as old as the marks on the bottom imply, I'm afraid. Looking at various features of the design and particularly the way the mark on the bottom is a printed stamp rather than painted with a brush, the jar dates to the second quarter of the 20th century, 1960s or 1970s.
The mark is an apocryphal Qianlong reign mark (1736 -1795), a stamped seal in traditional Chinese (kaishu) characters that reads (in columns from top to bottom, starting with the right hand column):
or "Da Qing Qian-Long Nian Zhi" which translates as "made in the reign of Emperor Qianlong of the great Qing dynasty".
It was quite typical for 20th century Chinese export porcelain to carry these apocryphal marks and was probably more a homage to past greatness rather than any deliberate intention to pass the work off as something older than it was.
As for value, your ginger jar is not old enough to have attracted any collector premium as yet, so would sell on its decorative and furnishing appeal. It you were to see it for sale in a retail setting, in a vintage store, for instance, it would have a price tag of about $150. This is also the replacement value for insurance purposes.
Expect to get about 30% to 40% of this if you were to sell at auction or on-line.
I do hope this helps and is not too disappointing, but you'd be doubly disappointed if I were to give you false hope it was worth more, if or when you ever came to sell it.
Please let me know if you like me to explain or expand on any of the above, I would be glad to.