Manufacturer sources · sizes by model and head
String trimmer line size: how to choose the right one
The right string trimmer line size is the one the manual names for the head fitted to your trimmer. Of the 140 US and Canadian trimmer models in this reference, 39 list 0.065 in, 76 list 0.080 in and 69 list 0.095 in.
To read a diameter in another unit, use the line diameter chart. To see the size for one trimmer, find your model.
Thicker is not better. Line thicker than the head allows can jam the spool, overload the motor and wear the eyelet. Use the size the manual gives, not the thickest the head will hold.
Find your size in four steps
- Read the model number on the tool label, not the box or the battery.
- Identify the head that is fitted: factory spool, bump-feed head or a replacement.
- Check the line diameter and shape the manual gives for that head.
- Buy that size, or the replacement spool the manual names.
Line sizes in this reference
| Line size | Metric | Models listing it | Examples (open the lookup) |
|---|---|---|---|
| 0.065 in | ≈ 1.65 mm | 39 | STIHL FSA 60 R, Husqvarna 525L, RYOBI RY402013BTL, CRAFTSMAN CMEST913, BLACK+DECKER GH900, WORX WG183 |
| 0.080 in | ≈ 2.03 mm | 76 | STIHL FSA 60 R, Husqvarna 525L, Greenworks ST24L00 (tool SKU 2118102AZ), RYOBI PCLST02B / PCLST02K, CRAFTSMAN CMESTHOS912, BLACK+DECKER GH3000 |
| 0.095 in | ≈ 2.41 mm | 69 | ECHO SRM-2620U, STIHL FS 56, Husqvarna 330iKL, EGO ST1500-S / ST1500, Greenworks 2140302 (80V 16-inch front mount), RYOBI RY40HPST02B |
| 0.105 in | ≈ 2.67 mm | 18 | ECHO SRM-2620U, STIHL FS 56, EGO BCX4500, Milwaukee 3006-20 / 3006-22, Husqvarna 525L, RYOBI RY402110 |
| 0.120 in | ≈ 3.05 mm | 5 | STIHL FS 111 / FS 111 R / FS 111 RX, EGO BCX4500 |
A model can appear under more than one size when its manual or its listed heads allow several.
Sizes by brand
| Brand | Models covered | Sizes in our records |
|---|---|---|
| BLACK+DECKER | 10 | 0.065 / 0.080 in |
| CRAFTSMAN | 13 | 0.065 / 0.080 / 0.095 in |
| DEWALT | 4 | 0.080 / 0.095 in |
| ECHO | 8 | 0.095 / 0.105 in |
| EGO | 14 | 0.095 / 0.105 / 0.120 in |
| Greenworks | 27 | 0.065 / 0.080 / 0.095 in |
| Husqvarna | 11 | 0.065 / 0.080 / 0.095 / 0.105 in |
| Kobalt | 8 | 0.065 / 0.080 / 0.095 in |
| Makita | 6 | 0.080 in |
| Milwaukee | 5 | 0.080 / 0.095 / 0.105 in |
| RYOBI | 12 | 0.065 / 0.080 / 0.095 / 0.105 in |
| STIHL | 7 | 0.065 / 0.080 / 0.095 / 0.105 / 0.120 in |
| Toro | 6 | 0.065 / 0.080 / 0.095 in |
| WORX | 9 | 0.065 / 0.080 / 0.095 in |
Brand ranges are a summary, not a fit rule. Two models from the same brand can take different line.
Related guides
Generated from 140 sourced trimmer models; each lookup result links its own manufacturer source.