UTC Vinyl Rib's half-round, D-shaped profile wraps soft and easy, giving a nymph body its segmented look in a size matched to the hook — medium for #8–12, nymph for #12–16, midge for #16–20. Specifications Available In: 3 sizes (Medium, Nymph, Midge), across a wide color range Material: Translucent, D-shaped (half-round) plastic Hook Size Match: Medium: #8–12 · Nymph: #12–16 · Midge: #16–20 Best for: segmented nymph bodies — Medium for crazy charlies, stoneflies, and large nymphs; Midge for midges and small nymphs; Nymph for midge-to-medium nymphs. The Medium diameter suits crazy charlies, stoneflies, and large nymphs on #8–12 hooks, Nymph size covers midge-to-medium nymphs on #12–16, and Midge size fits the smallest patterns on #16–20. A wide color selection within each size covers most segmented-body patterns without switching materials.
