I’m 5’7 and want to use this as a birthing ball i’m not sure if i should get an xl or a l! what’s the difference in birthing and exercising sizes?

Hi! I'm a Doula. It depends on which stage of that labor you are using the ball. For early labor For a 5 7 lady, I would use 65 ball. The key is, when you sit on the ball, you want your hips and your knee to be straight across, forming a 90 degree angle at the knee bend. You want to keep the top of your pelvis open to receive baby's head. Once baby's head has enteted the pelvis later in labor, you will want a smaller ball that nrings you closer to a squating position. This opens the lower part of the pelvis to allow baby to decend the canal.

why is the measurement tape so huge? I bought the second largest size and it's impossible to blow it up per the silly measurement tape. inflated std

The tape with a 65cm mark is ~200cm long. This is a circumference, 200cm = ~64cm diameter. My ball inflated to a reasonable pressure is ~180cm in circumference, which is around 57cm or 22" in diameter. So the tape is correct but I was sent a smaller size M (22") instead of L (26"). I see I'm not the only one received a smaller size.

Brand	Fitvids
Material	Polyvinyl Chloride (PVC)
Color	Black
Age Range (Description)	All
Item Weight	2 Pounds
Sport	Yoga
Item Diameter	55 Centimeters
Number of Items	1
Size	19-22in (48-55cm), M
Global Trade Identification Number	00810963031757
UPC	810963031757
Unit Count	1.0 Count
Item Package Dimensions L x W x H	9.57 x 7.87 x 3.9 inches
Package Weight	0.93 Kilograms
Brand Name	Fitvids
Warranty Description	All BalanceFrom products come with a 2-year warranty and 100% BalanceFrom Satisfaction to make your purchase worry free. Simply contact us or your vendor if you have any questions.
Model Name	Exercise Ball
Suggested Users	unisex-adult
Manufacturer	BalanceFrom
Part Number	BFEB-55BLK
Style	19-22in (48-55cm), M
Included Components	Exercise Ball
Outer Material	Rubber

Fitvids Anti-Burst and Slip Resistant Exercise Yoga Fitness Birthing Ball with Quick Pump, 2,000-Pound Capacity, Multiple Colors and Sizes

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