Vbiger Baby Carrier 6-in-1 with Hip Seat, Head Support and Breathable Mesh, Adjustable Removable Soft Ergonomic Baby Sling Carrier, Pink

Information:
Vbiger 6-In-1 Convertible Baby Carrier, 4-Position, Black, 6-in-1 Convertible Baby Carrier unique, convertible seat makes this the ideal carrier for infancy through toddler years.
Use the narrow seat position and padded head support to comfortably hold small infants. Switch to the wide position to continue to provide an ergonomic seat while your child grows.
With soft, easy-to-clean fabric, a transitional seat, and an adjustable waistband and straps, Vbiger Flip 6-in-1 Convertible Baby Carrier is a go-to when mom or dad need an extra set of hands.
Four different ways to carry: facing-in folded seat, facing-in expanded seat, facing-out, and back carry. With the Vbiger Flip 6-in-1 Convertible Baby Carrier, there's no place like close. For babies 8-35 lbs.
The three dimensional hard structured hip seat provides extra carrying assistance by evenly distributing baby's weight so there is less stress on your body.
Vbiger 6-In-1 Convertible Baby Carrier also offers all season comfort with an air ventilation panel and a removable hood for weather protection.
Finally, this carrier includes parent-friendly features like memory foam shoulder straps, removable strap covers and storage pocket.

Specifications:
Material: cotton & polyester fiber
Load capacity: 66.1lb/30kg( single stool within 22lb/10kg)
Application: suitable for babies aged 0-4 years old
Size (about): waistline 28.5-46.5''/71-118cm
Weight (about): 28.2oz/800g
Color: Pink

Package list:
1* waist stool
1* strap
1* back panel

Q : When adjuring , will the ring cut into the side / hip ?Are they still metal ?
A : No they don't . They're comfortable
Q : What size for a 16 lbs baby ?
A : I believe it's one size fits all . I have a 6 month old who is 23lbs and it works great
Q : How long can it be used ?
A:My daughter is almost 10 months old and 16 pounds and i can still use
Q : Is the material of this stretchy ?
A : Yes it's very stretchy and soft