These pins are 1 7/16" long, a little bit flexible and come to a very sharp point. The end of the pin is ridged to make it easier to hold. The plastic is heat resistant to prevent melting during ironing. The head isn't bulky which will make it lay flatter as you sew on the machine. All in all, these are very nice pins!
Please be aware that I'm pretty sure that the only difference between the Magic Silk pin and the Magic Patchwork pin is the color of the head. You can see me compare them in the 2nd video below. Sometimes it's handy to have the same pin in different colors so personally, I own and use both. But if you don't care about the color, buy either the Magic Patchwork pin or the Magic Silk pin, but not both.
The first video shows the features of the Patchwork pin, which are the same for this pin. The second video compares the Magic Patchwork pin to the Magic Silk pin.