I need to replace a fossil watch band

Moto 360 - Extra links for metal watch band - Motorola Support

https://motorola-global-portal.custhelp.com/app/.../prod.../2815,9141

Your metal watch band can be expanded by adding links. The small gray envelope inside the watch box (see image below) contains four extra metal links.

Order Links & Bands - Fossil

https://www.fossil.com/us/en/.../order-links-and-bands.html

Fossil GroupOrdering Links & Bands (U.S.). Order Links. Extra links can be ordered with a U.S. issued credit or debit card by calling the Metro Service Center at ...

Parts Archives - Citizen Watch - English (US)

Most probably in any department store.
You should measure size at pin

Best Sellers in Women Watch Bands

WOMEN WATCH BANDS

Ladies Genuine Italian Leather Watchband Black 12mm Watch Band by JP...

http://www.fossil.com/webapp/wcs/stores/servlet/CategoryView?catalogId=25005&DM_PersistentCookieCreated=true&parent_category_rn=331106&categoryId=454105&langId=-1&departmentCategoryId=331097&storeId=12052&ddkey=http%3AResolveCategoryIdentifier

http://www.ebay.com/itm/FOSSIL-AM3695-BIG-TIC-KALEIDO-BROWN-LEATHER-MENS-WATCH-/150793269174

Go to "fossil.com", go to the bottom of the page and you will see a menu, click on "customer care" and then look under "Product Info" on the left and you will see "0rdering links and bands"

Both metal and leather straps are available over the internet. I, however, recommend going to a jeweler that both sells and installs watch bracelets and straps. This will ensure a proper fit and you will have the opportunity to actually see the styles on your watch before purchase.
Generally, independant jewelers are the place to go for this as chains are too scared of messing up your watch to even change your battery.

The "gizmo" would be the pin that attaches the watch to the case. You can easily purchase a replacement pin or strap at any store that has watches (even Wal-Mart). These are very inexpensive and each one will cost you less than $10.

Bands are held to the watch body by springpins. To disengage them, I use a fine blade knife, and pull one end of the pin down by causing the blade to bite into the metal of the pin, between the eye of the band and the watch body. This method will work when dealing with leather straps, perhaps not with a metal band, depending on how much clearance there is between the watch fork and the band's eye.
If there is no clearance, it may be necessary to destroy the springpin to get the band free. Replacement pins can be purchased at a watch repairer.
Replacing batteries: You need the back off. Some screw on, most press in. Press- ins can usually be released with a knife blade, or small leverage device if there is a specific release place on the rear cover. On odd occasions, it becomes necessary to "use a hammer and chisel". Not easy.
Screw- off backs need a tool to engage the slots on the rear. Sometimes can be done with a pair of long- nose pliers.
The backs often have a fine rubber sealing ring, for water resistance.This needs to be put back in place carefully.
The batteries are held in place by various means, spring tension, clamping etc. Sometimes a screw or two must be loosened to free the battery.
Really, it is all a job for the experienced.
I only do work on my own and other family member's watches. I have a range of tools I have made for these. I wouldn't risk doing outsiders' watches. I do bands and batteries, but leave it at that.