WIZnet Ethernet HAT (W5100S) for Raspberry Pi Pico: 68 × 21 mm board and RJ45 jack position — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/wiznet-ethernet-hat-w5100s/  (sheet CC BY 4.0)
Basis: WIZnet Ethernet HAT V1.0.0 Gerber files and the UDE RB1-125BAG1A RJ45 datasheet.
Catalog version: 2026-10-20

Overall (mm): length 72.9, width 21.0, height 14.35
- Datum: board centred on X and Y, bottom on z=0, components on top; −X is the RJ45 end.
- Board 68.0 × 21.0 × 1.0 mm, square corners, no mounting holes (it stacks on the Pico via two 1×20 2.54 mm headers along the ±Y edges).
- RJ45 jack 21.79 × 15.75, x −38.9..−17.11, centred in Y, top 13.35 above the board; its front face overhangs the −X board edge by 4.9.
- Overall 72.9 long including the RJ45 overhang, 14.35 high.
- Not modelled: the headers, W5100S IC and passives. Exact nominal mm.

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- WIZnet: WIZnet Ethernet HAT documentation — web — Publisher's page; dimensions are facts — https://docs.wiznet.io/Product/Open-Source-Hardware/wiznet_ethernet_hat
- UDE / Chipsmall: RB1-125BAG1A RJ45 datasheet — web — Publisher's page; dimensions are facts — https://datasheet.chipsmall.com/RB1-125BAG1A/329978.pdf

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/wiznet-ethernet-hat-w5100s/index.json
API: https://xemstudio.com/api/geometry?object=wiznet-ethernet-hat-w5100s