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Firth Sweater
Firth is a top-down sweater with a set-in-sleeve construction and ribbing detail around the shoulder and the underarms. It’s a simple design with considered details and a great fit. It’ll quickly become a wardrobe staple.
This pattern ALSO includes bust shaping options to improve fit.
This pattern is available in both DK and fingering weight gauge! Once you purchase the pattern you’ll be able to download both documents.
Gauge - DK
22 stitches and 28 rows per 10 cm/4 inches in stockinette and
21 stitches and 28 rows per 10 cm/4 inches in 2x2 ribbing
Gauge - Fingering
26 stitches and 34 rows per 10 cm/4 inches in stockinette and
25 stitches and 34 rows per 10 cm/4 inches in 2x2 ribbing
Recommended needle size
DK - 3.75 (US5) needles, or needles required to get gauge
3.25mm (US3) needles, or 0.5mm smaller than above, for ribbing.
Fingering - 3.25 (US3) needles, or needles required to get gauge
2.75mm (US2) needles, or 0.5mm smaller than above, for ribbing.
Sizes: (1, 2, 3, 4, 5) (6, 7, 8, 9, 10)
Finished Chest Circumference (DK): 77.5 (88.5, 100, 107.5, 118.5) (130, 137.5, 149, 156.5, 167.5) cm/30.5 (34.75, 39.25, 42.25, 46.75) (51.25, 54.25, 58.5, 61.5, 66) inches
Finished chest measurements with bust shaping (DK):
D-cup: 82 (91.5, 101, 110.5, 123.5) (133, 142.5, 152, 161.5, 171) cm/32.25 (36, 39.75, 43.5, 48.5) (52.25, 56, 59.75, 63.5, 67.25) inches
F-cup: 87.5 (97, 106.5, 116, 129) (138.5, 148, 157.5, 167, 176) cm/34.5 (38.25, 42, 45.75, 50.75) (54.5, 58.25, 62, 65.75, 69.5) inches
Finished Chest Circumference (FINGERING): 77.5 (87, 96.5, 106, 119) (128.5, 138, 147.5, 157, 166) cm/30.5 (34.25, 38, 41.75, 46.75) (50.5, 54.25, 58, 61.75, 65.5) inches
Finished chest measurements with bust shaping:
D-cup: 82 (93, 104.5, 112, 123) (134.5, 142, 153.5, 161, 172) cm/32.25 (36.75, 41, 44, 48.5) (53, 56, 60.5, 63.25, 67.75) inches
F-cup: 87.5 (98.5, 110, 117.5, 128.5) (140, 147.5, 159, 166.5, 177.5) cm/34.5 (38.75, 43.25, 46.25, 50.75) (55, 58, 62.5, 65.5, 70) inches
Selecting a Size
6-12 cm/2.5-5 inches of positive ease is recommended, meaning you should pick a size that is 6-12 cm/2.5-5 inches larger than your chest measurement.
The pattern includes details on how to measure yourself to see if you should follow the additional bust-shaping.
Yardage
DK: 817 (897, 972, 1058, 1144) (1231, 1317, 1420, 1507, 1616) m/893
(981, 1063, 1157, 1251) (1346, 1441, 1553, 1648, 1768) yards
Fingering: 1093 (1208, 1369, 1461, 1599) (1759, 1817, 1967, 2093, 2197) meters/1195 (1320, 1497, 1599, 1748) (1925, 2036, 2151, 2290, 2402) yards
If you work the optional bust shaping, you will require 20-30m additional yarn.
Any yarn(s) that meet gauge can be used for this pattern.
The DK weight samples are knit in Drops Alpaca held with KFO Mohair AND Sunday Fibre Co 4ply held with their mohair.
Other yarns used by test knitters for the DK weight version include West Yorkshire Spinners Illustrious dk, Sandnesgarn Peer Gynt, Malabrigo Dos Tierras, Explorer knits and fibers Rockies DK, Purl Soho Cashmere Merino Bloom.
The fingering weight sample was knit in Kinross 4ply.
Other yarns used by test knitters include Drops Nord, Bendigo Woollen Mills Luxury 4ply, KFO Merino, Blue Sky Fibers Woolstok Light, Sonder Yarn Co. Sunday Morning 4ply.
Techniques
The following tutorials might be helpful when knitting this patten:
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- First published: September 2025
- Page created: September 5, 2025
- Last updated: September 5, 2025 …
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