Well, I've gotten fatter. Does anyone know a place, ideally in Phra Nakorn, where I can get another notch put in my leather belt?

Try a belt shop or a shoe repairer or buy a hole punch for a few baht.

Elastic waistband worked for me. Think ahead.

If the local street shoe repairer doesn't have a punch, the shoe repair kiosk, usually in the basement of the local mall, will do it for 20B or so.

Nail and hammer. job done.

 I only wear fishermen's pants always. 

Who needs holes. Bht 100 off the market.

If you have an electric drill you can make your own holes in a belt. I lost a lot of weight and my weightlifting belt did not fit well anymore. I had to add holes so i could put it tighter. The electric drill did the job and those belts are tougher then your average belt.

...Fireman's bracers.

get a "JackOz" belt.....no holes, just ratchet.

Always used electric drill going back as long as I can remember

Come to Pattaya. 

Soi Buakhao, jomtien and Pattaya beach road etc. 

 

The mobile belt salesmen walking the streets with hole punch. 

 

 

Hammer and six inch nail

 

https://www.lazada.co.th/products/10-diy-punching-punch-hollow-intl-i220938676-s337060679.html?search=1

 

Or your local hardware shop.

Have you not thought of using a fork or a nail/hammer combination? 

I usually buy a new belt.

14 minutes ago, Jaybott said:

I usually buy a new belt.

Or lose some inches!