Here is a sizing chart for bead heads and coneheads in relation to the hook size needed for each. I found it at creeksideangling.com.…

Fly Fishing Hook Sizes: How To Choose The Right Size - The Fly Crate

SF Cyclops Tungsten Bead Head Eyes for Fly Tying Nymph Head Ball Beads （25 Pieces # Copper 1/16-1.5mm : Sports & Outdoors

Fly Tying Bead Hook Sizing Chart – Blue Wing Olive

Hook and Bead Size Chart, Fly Tying

Fly Fishing Hook Sizes: How To Choose The Right Size - The Fly Crate

Knapek Barbless Hooks Knapek Barbless Hooks [] - 0.36 : Canadian Llama Co., Fly Tying Materials

Fly Tying Bead Hook Sizing Chart – Blue Wing Olive

Understanding Hook Sizes

Hook and Bead Size Chart, Fly Tying

Matching a Bead to a Hook