QUOTE(Jay Chua CC @ Apr 6 2015, 10:29 PM)
Bulk minimum how many? Bambino use 20 or 22?
Bulk is cheaper, but you have choice to buy 1 strap as well. Price about 2x of bulk price.
Bulk minimum is 5 or 10 per lot. I had friends/colleague to cover (weekender users) so I bulked some 20mm at first, found out none of my watch is 20mm so I use it for my Bambino. Then I started getting 22mm one whole bulk myself as well.
Bambino has a weird lug width of 21mm, if you don't mind the gap, a 20mm strap is always an easier and better fit, but if you are looking for leather and do not like to see gaps/spring bar, get a 22mm and notch it a little down to 21mm. 22mm Nato isn't bad either but you will feel a little forced when fitting it.
Here's a few example of my straps on bambino :
These 2 are 22mm Perlon straps on it. 22mm will look around the same like these. I do not have a picture with me now.


This is a 20mm leather on it, notice the gap where you can see the spring bars.

Personal preference really. I'm fine with both.
Oh and why I mentioned leather is because Bambino's own leather isn't doing the watch any justice. It's too hard. Change to a good one and prepare to get asked "Is this watch expensive?"