Simplicity 9338 is a charming vintage Jiffy sewing pattern designed for creating comfortable, easy-to-sew one-piece snap-on layette suits for babies. With only two main pattern pieces, this quick project is perfect for beginners, new parents, baby shower gifts, or anyone looking to sew classic handmade baby clothing with vintage simplicity.
Designed for newborn and 3–6 month babies, these practical one-piece rompers feature a comfortable fit, easy diaper access, and soft construction that’s ideal for everyday wear. The pattern includes two different neckline variations, allowing you to create multiple looks from one pattern.
View 1 features a low round neckline with back shoulder extensions that button to the front for easy dressing. View 2 has a higher round neckline with a convenient front snap closure and an optional purchased appliqué for added charm. Both versions are fully lined and include elastic casings at the front waistline and leg openings to provide a gentle, comfortable fit for active little ones.
As part of Simplicity’s popular “Jiffy” line, this pattern was designed to be fast and uncomplicated, using only two primary pattern pieces to reduce cutting and sewing time while still producing a polished finished garment.
The pattern is suitable for a wide variety of lightweight woven and knit fabrics including terrycloth, cotton knit, flannelette, leno, broadcloth, piqué, gingham, lawn, printed voile, and batiste, making it easy to create outfits for every season. Whether sewn in soft nursery prints, classic gingham, or vintage-inspired cottons, these snap-on suits become practical wardrobe staples for babies.
Perfect for vintage sewing enthusiasts, heirloom baby clothing makers, collectors of vintage layette patterns, and anyone who appreciates timeless baby fashions, Simplicity 9338 creates adorable handmade garments that are as functional today as when the pattern was first released.
Sizes Included:
Newborn: 7–13 lbs., approximately 17–24 inches tall
3–6 Months: 13–18 lbs., approximately 24–26½ inches tall
Pattern Includes:
Two versions of one-piece snap-on baby suits
Complete sewing instructions
Pattern pieces
Easy “Jiffy” construction using only two main pattern pieces
Fully lined design with elasticized waist and leg openings








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