The short answer
- 2015 Big Bertha. 20.5° 4-iron, 30° 7-iron, 44° PW, 49° AW and 54° SW. The lofts and lies are the ones Callaway printed for the 2015 XR and the 2014 X2 Hot, with longer 4- to 8-irons.
- Big Bertha OS, 2019 Big Bertha, Big Bertha B21. All three had Callaway product pages. None of the specification tables for them was archived, so their lofts are unknown here.
- 2023 Big Bertha. 18° 4-iron, 27° 7-iron, 42° PW and 47° AW, then a 52° GW and a 56° SW. The 2015 table has no GW.
Callaway kept reusing the name, so a listing that says "Big Bertha irons" could be any of the five. The back of the head dates a set, and the cues below cover four of them.
Big Bertha iron sets by year
The year comes from Callaway's own product code. The date beside it is the earliest capture of that page in the Internet Archive listing we pulled, which shows the page was online by then. Callaway may have published it earlier, and neither date is a release date.
| Set | Callaway code | Page online by | Related sets | Factory table |
|---|---|---|---|---|
| 2015 Big Bertha | irons-2015-big-bertha | October 3, 2014 | Women's set (page captured October 8, 2014) | In our catalog |
| Big Bertha OS | irons-2016-big-bertha-os | March 9, 2017 | Combo, women's, seniors and senior combo sets | Not archived |
| 2019 Big Bertha | irons-2019-big-bertha | May 30, 2019 | Combo, women's and women's combo sets | Not archived |
| Big Bertha B21 | irons-2021-big-bertha-b21 | September 26, 2020 | Combo set; Big Bertha REVA women's set and combo (October 2020) | Not archived |
| 2023 Big Bertha | irons-2023-big-bertha | June 7, 2023 | Combo set; Big Bertha REVA women's set (April 2023) and combo | In our catalog |
The combo sets put hybrids in place of the long irons. Callaway also sold a Big Bertha irons and hybrids combo with no year in its code in October 2014. That is a separate composition; check each club before you use an iron row for it. The REVA sets are women's models with their own pages. None of the REVA tables was archived either.
2015 vs. 2023 Big Bertha iron lofts
These are the standard men's figures from Callaway's US tables. The model names link to the full records with their sources.
| Club | 2015 loft | 2023 loft | 2015 lie | 2023 lie | 2015 length | 2023 length |
|---|---|---|---|---|---|---|
| 4 | 20.5° | 18° | 60.5° | 60.5° | 39.125 in | 38.75 in |
| 5 | 23° | 21° | 61.25° | 61.25° | 38.5 in | 38.125 in |
| 6 | 26° | 24° | 62° | 62° | 37.875 in | 37.5 in |
| 7 | 30° | 27° | 62.5° | 62.5° | 37.25 in | 37 in |
| 8 | 34.5° | 31.5° | 63° | 63° | 36.625 in | 36.5 in |
| 9 | 39° | 36.5° | 63.5° | 63.5° | 36 in | 36 in |
| PW | 44° | 42° | 64° | 64° | 35.75 in | 35.75 in |
| AW | 49° | 47° | 64° | 64° | 35.5 in | 35.5 in |
| GW | – | 52° | – | 64° | – | 35.25 in |
| SW | 54° | 56° | 64° | 64° | 35.25 in | 35 in |
The 2023 head is 2° to 3° stronger at every club from the 4-iron to the AW: 30° against 27° at the 7-iron and 44° against 42° at the pitching wedge. The lie row doesn't change at all, but the lengths do: the 2015 4-, 5- and 6-irons are 3/8 in longer, the 7-iron 1/4 in and the 8-iron 1/8 in. From the 9-iron to the AW the two tables print the same lengths.
The wedge rows differ the most. The 2015 table stops at an 49° AW and a 54° SW. The 2023 table runs 47° AW, 52° GW and 56° SW. So a 2015 sand wedge falls between the 2023 GW and SW, and the same letters don't mean the same club. Our guide to golf club letters explains how AW, GW and SW move across brands. The loft gap checker shows the steps if you mix wedges from the two sets.
Callaway printed a few more columns. The 2015 table gives a 30° 7-iron 3° of bounce and an offset of 0.230, with no unit, and lists D0 swing weight in graphite and D2 in steel. Callaway's product data for the 2023 set lists offset in millimeters, 6.9 mm at the 7-iron, and D0 in graphite and D1 in steel. A 2015 women's table prints the same lofts and lies, with each club 1 in shorter (a 36.25 in 7-iron), right-handed only.
Where the charts repeat: XR and Paradym
Neither Big Bertha table is unique to the name. The 2015 Big Bertha prints the same loft and lie at every club it lists as the 2015 XR and the 2014 X2 Hot, whose own tables are identical to each other. The XR and X2 Hot add a 3-iron and an LW. The Big Bertha's 4- to 7-irons are 1/4 in longer and its 8-iron 1/8 in longer; from the 9-iron down the lengths match.
The 2023 Big Bertha sits next to the 2023 Paradym. Its 4- to 7-irons are 2° stronger than the Paradym's, the 8-iron 1.5° and the 9-iron 0.5°, and the PW, AW and GW are identical. A measured 42° pitching wedge therefore fits either set, and a 30° 7-iron fits a 2015 Big Bertha, an XR or an X2 Hot. Loft narrows the field, and the head cues below settle it. Our Callaway Apex irons by year article shows the same pattern in the players' line, and Callaway's iron page lists every Callaway chart in the catalog.
How to tell the Big Bertha heads apart
These cues come from Callaway's own product photos of each set. Finishes and custom options can vary, so treat them as a starting point.
- 2015 Big Bertha. Dark finish. BIG BERTHA runs down a dark toe panel with red accents, and the Callaway script and chevron sit on a silver hexagonal badge in the middle of the cavity.
- Big Bertha OS. Dark finish. BIG BERTHA is printed on a white diagonal strip across a cavity with a grid pattern, with a small Callaway logo at the lower left (archived product photo).
- 2019 Big Bertha. We found no archived product photo, so we can't give a reliable cue.
- Big Bertha B21. Chrome body, with a blue trapezoid badge carrying the Callaway logo and BIG BERTHA lettered above it. Callaway's B21 page calls it the first Big Bertha iron designed with A.I. and describes a tungsten energy core, wider soles and more offset. Those are the maker's claims; we haven't measured them.
- 2023 Big Bertha. Dark finish. TUNGSTEN is printed in the top bar above three small slots, the Callaway script sits high on the back, and BIG BERTHA runs across a lower insert with a carbon-weave look and a red line.
Our guide to identifying older irons lists what else to photograph, and the Callaway iron year finder narrows the catalog by name and loft.
Checking a used Big Bertha set
- Read the back of the head. Match it to the cues above. A box, a headcover or the word Big Bertha on a listing isn't enough.
- Check for hybrids. Combo sets replace the long irons with hybrids, and those clubs need their own specs.
- Read the wedge letters against the right chart. A 2015 SW is 54° and a 2023 SW 56°; only the 2023 set lists a GW.
- Measure before you trust the table. Factory figures describe the original build. A 7-iron that measures nowhere near 30° (2015) or 27° (2023) points to bending, a custom order or a different model. Our used-iron checklist and length guide cover how.
- Treat OS, 2019 and B21 lofts as unknown. Without the factory table, measure the set rather than borrowing the 2015 or 2023 numbers.
Sources and limits
The 2015 figures come from our catalog record of Callaway's 2015 Big Bertha specification table, an Internet Archive capture of August 14, 2016, which also holds the women's table, bounce, offset and swing weight. The 2023 figures come from Callaway's 2023 Big Bertha page, retrieved September 28, 2026; the 2023 offset and swing weight are from Callaway's product data for the set as embedded on its Quantum Max irons page, read October 2, 2026. The XR, X2 Hot and Paradym comparisons use our records of Callaway's XR, X2 Hot and Paradym tables. Every number on this page is generated from those records, so a corrected record changes the text here too. The page codes and capture dates come from an Internet Archive listing of Callaway's iron pages pulled on October 8, 2026; the archive was offline when this article was written (October 16, 2026), so those captures were not reopened.
The codes give Callaway's model-year label, not a release date, and a first capture says only that a page was online by then. We did not find archived specification tables for the Big Bertha OS, the 2019 Big Bertha, the B21 or the REVA sets, and this article doesn't estimate them. Any Big Bertha irons from before the 2015 model are outside these sources. The head cues describe Callaway's product photos, not every finish or custom build. No clubs were inspected, measured or hit, and a stronger loft says nothing on its own about how far a club carries or whether it fits you.