pink clawed piggies rule !
Easier to do with two people. DD holds the piggie on her lap with its back to her stomach. One hand under their front legs , the other under the rump so they aren't sitting on their spine.
Good sharp clippers , you don't want to crush the nail. I bought some nifty ones from Joleys , like scissors but a round 'notch] so the cutting bit is like a guillotine rather than scissor blades.
If the claws are long the quick will be, cut a bit off regularly to let the quick shrink.
You'll see the end bit is pointed and more opaque . That's the bit to clip.
The worst ones are the front outside ones, they curl.
We do back feet one day, front the next (but we had 5 pigs at one time so it was a conveyer belt . Of course I got the Evil Eye from them)
Rex and Teddy have big thick claws (but thankfully our coarse coatees GP3 and GP6 are laidback boars)
It is important to keep nails trimmed , they walk on their heels with long nails and can fracture the tiny bones in their paws.
I've had one bleed (GP4) she was not amused ...and my gawd, they bleed well (though vets take blood from a claw so its not a huge injury though your pig will wail at you)