[MENTION=127188]LordHampster[/MENTION] - If you happen to travel to Japan, they have an excellent pigtail extension cord with swivel plug which can be used with the smaller USB-C wall wart. I find 0.3m pretty usable
https://www.amazon.co.jp/%E3%82%A8%E...DCTE4EVBTW9J65
0.1m also available
https://www.amazon.co.jp/%E3%82%B5%E...ords=0.3m&th=1

These aren't light (or rather, heavier than one would expect for such a small extension cord) but I really like the swivel plug to relieve strain on loose power sockets or behind furniture.

I'm not sure what the weight on similar non-swivel short extensions are but these would be easier/cheaper to get for those in US.
https://www.ebay.com/itm/USA-Japan-2....c100005.m1851
https://www.ebay.com/itm/USA-Canada-...IAAOxy4YdTWAd4