1000 screws, a random selection of "the most popular sizes".
They are mostly larger screws for watch cases, spectacle frames etc, but there are also a few dozen tiny screws for watch movements.
Click here to see 250 smaller screws for watch movements.
See an information article, A Short description of Screw Types.
Will we have the size you want?
PLEASE do not send the measurements and ask us to look through the box and measure them. I did once try this, - I eventually calculated that it could take several hours to find an exact match (there are thousands of screw types - length, diameter, head type, thread pitch...)
There are 1000 screws, and they are common sizes, and there is a fair chance that you will find the one you want. ..but not guaranteed.
My best suggestion is: buy them, and if you don't find the screw you want this time, then maybe you'll find one for your next job.