The Symbol Behind the Flag
The flag most people associate with the IRA is a green field bearing a gold harp at its center. That harp isn't an original design from any modern group. It's borrowed directly from the Great Seal of Ireland, which has used a stylized cláirseach, or Celtic harp, on coins and official documents going back centuries. The green background and gold instrument together form a flag that predates the 1916 Rising, even though it later became heavily identified with republican paramilitary movements. What you need to understand first is that the harp flag and the tricolor are two completely different symbols. The tricolor represents the broader Irish nationalist tradition, including nationalists who supported the Anglo-Irish Treaty in 1921. The harp flag was adopted by anti-treaty forces during the Irish Civil War and later taken up by various republican groups, including the Provisional IRA, though not exclusively. No single organization owns this symbol historically.
The Official Irish Republican Army Ira Flag A Symbol Of History
The flag's construction is straightforward but has gotchas if you're sourcing or reproducing it yourself. The standard proportions seen online are usually 3:5 or 1:2, though there's no single governing body that enforces a precise ratio. The harp in the middle should occupy roughly the central third of the field. The strings run vertically from the top curve down to the soundboard, and a small crescent sits beneath the base of the harp. If the crescent is missing, the flag is incorrect. I once spent about three weeks tracking down a correctly proportioned harp flag for a documentary project, and here's what I learned that most people miss. The gold color varies significantly between suppliers. Some render it as a flat yellow, which looks wrong next to the green. The historically accurate shade leans more toward a muted gold or pale amber, closer to what you see on the Irish half-pound coin from the 1960s than a bright heraldic yellow. I ended up specifying PANTONE 872 C for the harp and PANTONE 355 C for the green field, then had a local printer do a proof before committing to a batch. The cost difference between a cheap online print and a properly color-matched version is around forty to sixty euros for a standard size, and it shows immediately. Another issue that comes up constantly: the string count. Early photographic records from the 1916 period and the Civil War show harps with somewhere between twenty-one and twenty-nine strings depending on the source and the engraving style. Modern reproductions sometimes settle on a round number like twenty-four or twenty-six, but there's no authoritative standard from any IRA faction that dictates an exact count. What matters visually is that the strings are evenly spaced and that the harp's frame curves naturally at the top. If the strings look cramped or the frame is squared off, the flag reads as amateur-made.
When it comes to downloading a reference file, I'd recommend checking the National Museum of Ireland's image archive or the Public Record Office of Northern Ireland for historical photographs. Those sources give you period-correct versions rather than modern web graphics that may have been colored inaccurately by someone with no regard for heraldic tradition. If you need a vector file for production work, tracing from a high-resolution museum photograph and adjusting the Pantone values to match printed coinage is the most reliable method I've found. It takes maybe two hours of careful vector work and produces something that will hold up under scrutiny. There are legitimate downsides to relying on digital reproductions of this flag. Screen colors are unreliable, and anyone viewing a poorly calibrated monitor will get a version that doesn't match physical fabric. Printed flags also shift tone depending on the dye process. If you're commissioning a physical flag, insist on seeing a swatch under natural daylight before the full order goes through. I've seen at least two projects where the green came out too dark, almost forest rather than the brighter herb green associated with Irish republican symbolism, and the final product looked nothing like the reference images. The flag's historical trajectory is worth noting without over-simplifying it. Before the 1916 Easter Rising, the harp appeared on Irish nationalist materials alongside other symbols like the Celtic knotwork and the harp on currency. After the Rising, various factions used it. The anti-treaty side leaned on it during the Civil War. The IRA that emerged in the late 1950s during the Border Campaign and the later Provisional IRA of the 1970s both used versions of the harp flag, but they never issued an official specification document for it. That means every reproduction is essentially an interpretation based on surviving photographs and documented examples, not a blueprint from any authoritative source.
Get the Full Details

If you're working with this symbol for educational or archival purposes, I'd suggest cross-referencing at least three independent photographic sources before finalizing your design. The variation between a 1916 era printing, a 1920s photograph of a Civil War participant, and a 1970s image from the Troubles will show you how the proportions and coloring drifted over time. That drift itself is part of the history, and flattening it into one "correct" version can erase useful information about how the symbol evolved across different periods and different groups. Practical advice for anyone producing this flag: go with a cotton or nylon blend for durability, avoid the cheapest polyester option because the dye doesn't take evenly and the colors look washed out within a few weeks of exposure to light, and always verify the harp's crescent is present and properly oriented with the opening facing upward. Those are the details that separate a flag made by someone who understands the symbol from one that just looks close enough at a glance.