What size weight bankets glass beads it needs?
The glass beads used in  weight blanket are much smaller than the more commonly used plastic poly pellets – in fact, they’re tiny and bear more resemblance to sand or sugar grains than actual ‘beads’.
So look to buy glass beads that are at least .75 – 1mm in size (sometimes labelled as #3), or they may pass through some fabrics or shift between the weighted blanket pockets.
We’ve seen some people using larger glass beads, but keep in mind, the larger bead you use, the lumpier the blanket will get. There is also a risk of chipping with larger glass beads, which could lead to sharp edges.

• DH™ GLASS MICRO-SPHERES: Made in the China, Consistently Smooth & Round. Other glass beads may be small, rough & sand like - these are very small round balls of glass
• MORE THAN 2X THE DENSITY OF PLASTIC PELLETS: 1 Cup of Glass Beads = Approx 14 ounces
• MACHINE WASHABLE & DRYABLE: Glass filler beads are perfect for weighted blankets, anxiety blankets, weighted quilts, weighted comforters, lap pads, reborn dolls, DIY medicine balls, plush toys & more
• SEW WITH EASE: Smooth, small round glass beads mean less busted needles
• EARTH FRIENDLY: Great stuffing for filler alternative to poly plastic pellets

  

• DH™ Made, Crystal Clear, With Consistent Size (1mm)

Like the Poly Poly beads, Pinwheel micro glass beads are also designed specifically for use in craft projects, such as sensory weighted blankets and vests or weighted stuffed animals etc. The beads are easy to measure for your craft projects, with Pinwheel recommending 20 TBSP = 1 lbs.

• DH™ GLASS MICRO-SPHERES: Made in the China, Consistently Smooth & Round. Other glass beads may be small, rough & sand like - these are very small round balls of glass
• MORE THAN 2X THE DENSITY OF PLASTIC PELLETS: 1 Cup of Glass Beads = Approx 14 ounces
• MACHINE WASHABLE & DRYABLE: Glass filler beads are perfect for weighted blankets, anxiety blankets, weighted quilts, weighted comforters, lap pads, reborn dolls, DIY medicine balls, plush toys & more
• SEW WITH EASE: Smooth, small round glass beads mean less busted needles
• EARTH FRIENDLY: Great stuffing for filler alternative to poly plastic pellets
• Round Glass Micro Beads: Made in the China
• 2X the Density of Plastic Pellets: 1 Cup = Approximately 14 Ounces
• Machine Washable & Dryable
What’s nice about the the DAOHONG glass beads it’s that they’re sold specifically for filling and stuffing weighted blankets and comforters, sensory products such as weighted lap pads or vests or other crafts and sewing projects requiring beads.
High quality, the beads are virgin glass (i.e. not recycled) and consistently shaped with round, smooth edges. Some glass beads, with rougher edges, may tear material or not move around as smoothly inside blankets.
DH™glass beads are also helpfully available in a range of weights – usually 10, 25 and 50lb.

• DH™ Made, Crystal Clear, With Consistent Size (1mm)

Like the Poly Poly beads, Pinwheel micro glass beads are also designed specifically for use in craft projects, such as sensory weighted blankets and vests or weighted stuffed animals etc. The beads are easy to measure for your craft projects, with Pinwheel recommending 20 TBSP = 1 lbs.
The smoothly designed rounded beads are also easy to sew without damaging your needle. 
Available in 10lb tubs. 25 and 40lb weight sizes also sometimes available.CONSIDERATIONS WHEN USING GLASS BEADS
1 – Glass beads are finer than plastic poly pellets
This means they sit more densely inside a weighted blanket.
So although weight for weight, a blanket with glass beads or poly pellets will remain the same, the volume (the amount of space a substance or object occupies) is less in a blanket filled with glass beads.
This essentially means a weighted blanket filled with denser micro glass beads will be thinner than a blanket filled with plastic poly pellets, which are larger and take up more space.
2 – Check your fabric and stitch size
There can occasionally be issues with using glass beads with certain fabrics, which have a weave that’s too loose to hold the micro glass bead fill.
So if you plan to use glass beads in a homemade weighted blanket, it’s important to double check your fabric and stitch length to make sure that they’ll contain the beads securely.

• DH™ GLASS MICRO-SPHERES: Made in the China, Consistently Smooth & Round. Other glass beads may be small, rough & sand like - these are very small round balls of glass
• MORE THAN 2X THE DENSITY OF PLASTIC PELLETS: 1 Cup of Glass Beads = Approx 14 ounces
• MACHINE WASHABLE & DRYABLE: Glass filler beads are perfect for weighted blankets, anxiety blankets, weighted quilts, weighted comforters, lap pads, reborn dolls, DIY medicine balls, plush toys & more
• SEW WITH EASE: Smooth, small round glass beads mean less busted needles
• EARTH FRIENDLY: Great stuffing for filler alternative to poly plastic pellets