Realism or Black and grey?

These two get offered as alternatives and they are not. Realism is about likeness: how closely the drawing follows what the eye would actually see. Black and grey is about palette: no colour, just a range of greys. You can have a realistic portrait in full colour, and you can have a completely stylised drawing in grey. If what you picture is a photographic likeness without colour, you are asking for both at once, and the artist you need is one whose portfolio shows both.

Realistic lion portrait tattoo design sheet with detailed mane and facial close-up
Realism
Black and grey rose tattoo design sheet with shaded petals and close-up detail
Black and grey

Side by side

What you are comparingRealismBlack and grey
What it describesHow closely the drawing follows realityWhich colours are used, namely none
Can it combine with the otherYes: realism exists in full colour tooYes: plenty of grey work is not realistic at all
What to look for in an artistLikeness, and the same subject type as yoursSmooth healed mid-tones with no banding
Size floorLarge; a face needs room to be accepted as a faceModerate; gradients need span but not likeness

Which to ask for

Say realism first if the subject has to be recognisable as a specific person or animal. Say black and grey first if the absence of colour is the point and the subject can be stylised. Say both if you want a photographic result without colour, and expect to be quoted for a larger piece across several sessions.

These are directions for describing what you want, not rules every artist follows. Bring both names to your consultation and let the artist tell you which one fits your subject and placement.

AI Tattoo produces design concepts, not tattoo-ready instructions. Review line spacing, placement, scale and practical execution with a tattoo artist before committing to a design.