wheel size confusion
Inch measurements for wheels are really just labels that often refer to the diameter of the rim plus a nominally sized tire rather than an accurate measurement of the rim diameter.

The 622x19 spec is what you need to pay attention to. 622 is the diameter of the rim bead seat in mm. 19 is the inner width of the rim in mm.

Look at your tires, if they are marked 'ISO 622' or 'ETRTO 622' or '700C' (an French system label that is the same as ETRTO/ISO 622), then they are 622mm diameter.

You can measure the inner rim width of your rims. They don't have to be exactly 19 mm for your current tires to fit. A tire of a given overall width will fit on a range of rim widths.