Here are ballpark ranges you could use as a baseline, then adjust based on your specifics:
Simple stretch bracelet / basic bead design: ~$25–$40
Standard custom bracelet with good-quality findings + minor personalization: ~$40–$75
Custom necklace or multi-strand, higher-end materials, full personalization: ~$75–$150+
Highly bespoke piece, luxury materials, strong brand/lifestyle positioning: $150+ (could go higher depending on materials and brand)