Interactive Flat Panel Sizes: 55–110 Inches Compared

The One Rule: the Farthest Viewer Decides

Every sizing method is a version of the same rule: the farthest viewer must read the smallest content you show — usually body text, spreadsheet figures or code. Diagonal inches are a proxy for that readability, and room depth is the input: the deeper the room, the larger the diagonal it needs, with 110 inches covering the largest standard rooms before projection or LED takes over. Content type shifts the answer — video tolerates distance, spreadsheets and code punish it — so measure the room, name the content, and let the quotation confirm the diagonal against both.

Measure your rooms before reading any further. It takes ten minutes, and it converts every price list you will ever receive from a menu into a specification.

55 and 65 Inches: Huddle Rooms and Small Classrooms

The 55-inch size opens the E, U and A ranges (the A series' rotatable model is a 55) and suits huddle rooms, small meeting rooms, offices and primary classrooms where the back row is close. Its overlooked virtue is mobility: at 55 inches a panel on a movable stand is genuinely movable, which is why the rotatable A-series model exists at this size. The 65-inch is the most-published size in the catalogue — every series includes it — and the default for standard meeting rooms and secondary classrooms. If a room seats twelve or fewer and the content is presentation-led, 65 inches with the right touch specification beats 75 inches with the wrong one.

75 and 86 Inches: the Classroom Centre of Gravity

Most full-size classrooms land at 75 or 86 inches: large enough for the back row of a thirty-student room, small enough to remain a single-person installation decision. The 86-inch is where the M series tops out and where most series' mid-configurations sit, and it is the size at which wall construction starts to matter — an 86-inch panel is a serious wall load, and the mounting conversation (wall type, bracket, or a stand) belongs in the enquiry, not on installation day. Choose 75 when the room is wide rather than deep; choose 86 when it is deep rather than wide.

98 and 110 Inches: Lecture Spaces and the LED Boundary

At 98 inches — published across the E, R and U series — the panel serves lecture-style rooms and large boardrooms while keeping touch, which no projector at this size matches economically. At 110 inches, the top of the E series, the panel is competing directly with projection and all-in-one LED, and the comparison should be run honestly: the panel wins on light tolerance and touch, the LED wall wins when the canvas must exceed even this, and projection wins on raw size per cost in darkened rooms. Freight also enters the decision at these sizes — crating and moving a 110-inch panel is a logistics line item, and the landed quotation will show it.

The series pages on this site carry the size grid per model, so once the room has chosen its diagonal, the shortlist writes itself: which series publish that size with the touch, camera and system options your workflow needs. Send the room list with sizes through the quote form and the mapping is done for you, model by model.

Series Availability by Size — Reading the Grid

The size grid is not uniform across series, and the exceptions carry information. The M series stops at 86 inches because its cost mission ends there; the A series starts at 55 with its rotatable model and reaches 105 in the A10 line rather than the E series' 110; the R series runs 65–98 and the U series spans 55–98 depending on model, the band where their camera, AI and management configurations are most often specified. When a size is missing from a series, the manufacturer is telling you where that series' economics stop working — information worth more than a forced availability.

The practical method is two-pass: first pass, the room chooses the size; second pass, the workflow chooses among the series that publish that size. If the intersection is empty — the size exists but not with the configuration you need — the honest moves are one size step in either direction or a documented option change, and the quotation should show both rather than silently substituting. This is also where mixed estates stop looking indecisive: a school standardised on one series for software and spares, with sizes varying by room, is the normal end-state of the two-pass method.

Wall, Weight and the Mounting Decision

Size decisions end at the wall. Panels grow heavy and unforgiving as diagonals rise: the mounting conversation — stud or masonry, bracket rating, or a floor stand that takes the building out of the equation — must happen at quotation, with the wall type stated. Mobile stands deserve more respect than they get: they convert one panel into a multi-room asset, suit rented and reconfiguring spaces, and at 55 inches (the rotatable A-series format) create a presentation tool no fixed installation matches. Conversely, a wall-mounted 98-inch panel in a purpose-built boardroom is infrastructure, and should be cabled, powered and networked like it.

Freight geometry joins the decision at 98 inches and above: packaging dimensions, lift and corridor clearances, and the delivery route into the room belong in the site survey. Suppliers price what they can see; a quotation that includes the route survey is a quotation that survives delivery day.

A Worked Example: Three Rooms, Three Answers

Consider a typical school floor. The standard classroom, 9 metres deep with thirty students, lands at 75 or 86 inches: the E series at 86 with 40-point touch if group writing is daily, the M series at 75 or 86 if the budget must stretch across twenty such rooms. The science laboratory, where demonstrations cluster students closer and the document camera does the magnifying, is honestly served at 65–75 inches with the camera budget protected. The staff room turned meeting space, shallow and bright, takes a 65-inch panel with the camera-and-microphone configuration for hybrid meetings rather than a larger screen nobody sits far enough from. Three rooms, three sizes, three configurations — and a total below the cost of standardising everything at the largest size 'to be safe'.

That is the real lesson of the size ladder: uniformity is a value in maintenance, not in diagonal. Standardise the series and the software; let the rooms choose their sizes.