Anatomy of a signal
Not as complex as it might look. Ten groups of measurements, 9 are taken in cm. Only the first measurement of overall height and width are in inches.
Using this "G" U-229 first measure overall height and width. In this case it is "4" x 2.9""
More often than not the skirt is the widest measurement. In this case the wire ridge measurement just needs to be converted to cm.
Third take 2 measurements for the wire groove. At the narrowest point inside the groove measure it's diameter. Second measure the height of the groove.
" 4" x 2.9 "
7.4 cm
1.2 cm  x  5.8 cm
Fourth is the skirt height. Measured from the bottom of the skirt to the lower edge of the wire groove.
Fifth is the total pinhole depth. From pinhole top to longest measurable pount on skirt or petticoat (if petticoat rested).
Sixth is the depth of just the threads themselves.
Seventh measure the depth to the first thread from the farthest point on skirt (or petticoat if petticoat rested).
Eighth measure the depth of the skirt-to-petticoat groove.
First measure the inner diameter of the petticoat.
Next measure the distance from the petticoat to the skirt.
Lastly, measure the distance from the inner petticoat to the outer skirt.
This page is currently being built. Eventually there will be more/better pics for seeing measurements demonstrated. The chart on the right is what I use for U# comparison along with silhouette transparencies.
3.7 cm
8 cm
5.5 cm