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Live · checked today · 3 UK retailers tracked
Callaway BIG Bertha B21 Hybrid vs Callaway BIG Bertha OS Hybrid
Quick verdict
Checked daily across 3 UK retailers
Price and availability verdict
Callaway BIG Bertha B21 Hybrid is currently £88.99 used, while Callaway BIG Bertha OS Hybrid is currently £42.99 used. Against tracked history, Callaway BIG Bertha B21 Hybrid is 18% above its lowest tracked price and Callaway BIG Bertha OS Hybrid is 16% above its lowest tracked price. Callaway BIG Bertha B21 Hybrid is currently available from 3 UK retailers, versus 2 for Callaway BIG Bertha OS Hybrid.
Callaway
BIG Bertha B21 Hybrid
£88.99 used No change 5% below usual Buy £88.99 → at Golf Clubs 4 CashDeal intelligence
Should you buy now, or wait?
Neither is at its low today. The Callaway BIG Bertha OS Hybrid is closest, within 16% of its lowest tracked price. The Callaway BIG Bertha B21 Hybrid has more room: its tracked low is £84.95.
Callaway · BIG Bertha B21 Hybrid
Not enough data yet
Today £99.95 · usual £89.95 · lowest £84.95
On sale 1 time in the last 3 months
Callaway · BIG Bertha OS Hybrid
Not enough data yet
Today £78.95 · usual £99.95 · lowest £67.95
On sale 1 time in the last 4 months
Head to head
Category leaders, from the data on this page
- Cheapest new BIG Bertha OS £42.99 vs £88.99
- Closest to its tracked low BIG Bertha OS 16% above vs 18%
- Most retailers in stock BIG Bertha B21 3 vs 2
- Cheapest used BIG Bertha OS from £42.99 vs £88.99
Specification differences
Published product specifications
| Specification | Callaway BIG Bertha B21 Hybrid | Callaway BIG Bertha OS Hybrid |
|---|---|---|
| Release year | 2021 | 2022 |
Where to buy
3 UK retailers, checked daily
Price trajectory
How each has moved since we started tracking
Lowest tracked price per day, any condition. Caddence tracks both daily. Shaded spans are days we couldn’t collect prices — the lines break rather than guessing.
Callaway · BIG Bertha B21 Hybrid
↓ £59.05
since 23 February 2026
Lowest £84.95 on 18 August 2026
Callaway · BIG Bertha OS Hybrid
↓ £21
since 9 April 2026
Lowest £67.95 on 18 August 2026
New vs used
From used listings we track
Callaway · BIG Bertha B21 Hybrid
NEW £88.99
USED FROM £88.99
Callaway · BIG Bertha OS Hybrid
NEW £42.99
USED FROM £42.99
Availability by build
Which configurations are in stock right now
| Build | Callaway BIG Bertha B21 Hybrid | Callaway BIG Bertha OS Hybrid |
|---|---|---|
| Regular · 19° · Left-hand · Used | 2 retailers · from £99.95 at Replay Golf → | — |
| Regular · 21° · Used | 2 retailers · from £88.99 at Golf Clubs 4 Cash → | — |
| Senior · 19° · Used | 1 retailer · from £109.99 at Golf Clubs 4 Cash → | — |
| Stiff · 19° · Used | 1 retailer · from £109.99 at Golf Clubs 4 Cash → | — |
| Stiff · 21° · Used | 1 retailer · from £109.99 at Golf Clubs 4 Cash → | — |
| Regular · 24° · Left-hand · Used | 1 retailer · from £104.99 at Golf Clubs 4 Cash → | — |
| Regular · 21° · Left-hand · Used | 1 retailer · from £104.99 at Golf Clubs 4 Cash → | — |
| Regular · 19° · Used | — | 1 retailer · from £42.99 at Golf Clubs 4 Cash → |
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Common questions about the Callaway BIG Bertha B21 Hybrid vs Callaway BIG Bertha OS Hybrid
Prices shown are the cheapest in-stock price per retailer tracked by Caddence, updated daily. Always confirm the final price on the retailer's site.