The sweaters in the photo were knit as color swatches & not to any particular size, but when I was asked to write up the pattern after the catalog was released I standardized the sizing (so any “oddness” in necks/sleeves/sizes has all been fixed in the pattern).
Each sweater takes around 100-150 yards & and from experience I can say that the whole set of 10 can be knit in a weekend if you are very very determined, and ignore things like walking the dogs, eating, sleeping…

you can find the first 5 sweaters here: Prairie Doll Sweaters

Skill Level
Intermediate

Finished Size
To fit 18” (46cm) doll
Chest: 12½“ (32cm)
Length: 7” (17.8cm)

Materials
• Willow Yarns™ Prairie (100% superwash merino; 100g/191yd)
-732268-0010 Toadstool (1 ball): A
-732268-0009 Cool Water (1 ball): B
-732268-0008 Summer Sky (1 ball): C
-732268-0007 Stone House (1 ball): D
-732268-0001 Stone Path (1 ball): E
• US size 8 (5mm) straight needles or size needed to obtain gauge
• US size 8 (5mm) dpn or size needed to obtain gauge
• US size 7 (4.5mm) straight needles
• US size 7 (4.5mm) dpn
• Stitch markers
• Yarn needle
• Waste yarn
• Stitch holder
• Three ½“ (1.3cm) buttons
• Sewing needle and thread

Gauge
18 sts x 24 rows = 4” (10.2cm) in St st with size 8 (5mm) needle
Save time, check your gauge.