They seem to have gone up in price a few dollars since (coronavirus I guess), but mine was this brand and they currently have all different patterns to choose from. It folds and is adjustable height and seems to go pretty high for tall people:
Folding cane: Nova Folding Cane Link

They have also these ones that *dont* fold up but are adjustable heights with a different handle: Nova Cane Link .

I searched 'Folding Cane' and they have a bunch of other brands too. :)