Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: joylve Knitting Yarn Skein Baby Super Smooth Worsted Soft Natural Silk Wool Fiber Water Blue
Product description: Description Item Detail Information: Refined soft Silk wool cashmere pilling resistant and shrinkage resistant Noble comfortable and good-fold Overhanging anti-sun radiation Soft, warm, durable, and with Cashmere Feeling! Cashmere: 98% Lamb cashmere: 2% Color: as picture 100% Pure New Ball Size:50 grams per ball Needle Sizes (recommended) : US 3 Fingering weight All balls are from same dye lot. Hand wash in lukewarm water, lay flat to dry. Package: New in plastic bag Package including: 1 x 50g Worsted Super Soft Smooth Natural Silk Wool Fiber Baby Yarn
Product feature: Made of refined soft Silk wool cashmere, Soft, warm, durable, and with Cashmere Feeling, Hand wash tumble dry do not bleach do not iron do not dry clean, Noble comfortable and good-fold, Natural soft and absorbent cotton is ideal for knitting and crocheting kitchen and bath projects
Product price: $2.69
Product brand: Joylive
Target attributes: Thickness
Answer: attribute: thickness
value: fingering weight
source: product description