I saw an amazing video with a great idea on how to create claws when you have longer nails. I want to go as a Vampire this year, but those claws that you buy look terrible on me, because my nails are long and you can see them under the fake claws. The video was in German, which kinda "spooked" me at first, but the girl added English subtitles (thank god). Here is the video and the instructions she gives:
You can to use a nude that is the most similar to your own skin tone.
That will help you with the next step.
Position the duct tape or striping tape between the previous painted point up to the nail tip to create the claw.
And remove the striping tape immediately.
You can use a matt topcoat or some red glitter polish.