A 34-inch ultrawide with a portrait 24-inch chat panel for streaming

How this is calculated

The portrait 24-inch is the chat and monitoring panel. At about 11.8 inches (30 cm) of usable width and 20.9 inches (53 cm) of height in portrait, it shows far more lines of a chat scroll or a long code file than a landscape panel of the same size. Mounted beside the ultrawide at the same base level, the portrait 24-inch towers about 7.5 inches (19 cm) above the ultrawide top, so an arm that drops its top edge back in line is more necessary here, not less. The 55-inch (140 cm) desk width leaves room beside the panels for a microphone, a stream deck, or a headphone stand.

Verdict

The 34-inch ultrawide at about 31.4 inches (80 cm) plus the portrait 24-inch at about 11.8 inches (30 cm) spans roughly 43 inches (110 cm) against a 55-inch (140 cm) desk, leaving about 6 inches (15 cm) of clearance per side for a microphone or stream deck. The value of the portrait panel is vertical lines: at roughly 20.9 inches (53 cm) tall it shows far more of a chat scroll or a long code file than a landscape panel. The height gap is large, since the portrait 24-inch towers about 7.5 inches (19 cm) above the 13.4-inch (34 cm) tall ultrawide at the same base level, and a VESA arm that drops the chat panel top edge back in line is the move that keeps the pair looking intentional. This is a clean two-panel layout for streaming and coding on a standard-width desk.