Yes, 025 is thicker than 019. In numerical terms, the first two digits represent the thickness in thousandths of an inch, so 025 corresponds to 0.025 inches, while 019 corresponds to 0.019 inches. Therefore, 025 has a greater thickness than 019.
Since the caliper readings are in reference to zero, a reading of 019 (or, more accurately, 0.019) is the smaller of the two. This reading is "nineteen thousandths of an inch".
5 inch gauge is garden railway but 3.5 inch gauge is the smallest elevated gauge for a railway http://www.rideonrailways.co.uk/
If there is no decimal, then 019 is bigger.
16 gauge
019
.019 is thicker.
Between 6 and 7 gauge. 6 is thicker at .194 inch. 7 is thinner at .179 inch.
i have a champion 12 gauge by iver johnson with a 36 inch barrel
1/2 inch is 12.7mm
no
019 is bigger than 0.