After losing weight, how do I say I can wear my belt tighter?

So, yes, I have been losing weight, so far down 4kg and 2 to 3 inches in waist.

I am happy and when I was trying to say to someone that now I can wear my belt tighter, I don't know how to say it because I wonder:

• Is there a specific name for the holes on the belt?
• Is there a specific verb for wearing a belt?

In the end, I said "I can now comfortably buckle 2 to 3 holes tighter when wearing my belt."

Sure, it is easy enough to be understood, but is there a better way of expressing that? Also, can I use "buckle" here for belt, in a same sense that it is used in "buckle up" (car seat-belt)? I know the word buckle actually refers to the rectangular metal thing that holds the belt in place, but the best I could think of is "buckle two holes tighter".

Solution 1:

Notch is the word you are looking for to refer to holes in the belt. And I think there is no specific word for "wearing a belt", this is correct as per my knowledge. And I tightened my belt after losing some weight. It's similar to "tightening shoe lace".

Solution 2:

I would suggest you say:

Since I lost some weight I've been able to cinch my belt tighter.