can you store 15 mm crochet hooks in this?

Hello Monk,Sorry about that, 15mm is too large to hold it for the spring ring.+++++Hope this would be helpful to you!

You mention a few pencil brands that are skinny like Prismacolor. Will this hold true art pencils, such as Faber-Castell Polychromos?

Hello Maggie,Yes, of course. The elastic ring can fit any pencil that diameter not large than 10mm (suggested best fit 6-8mm).+++++Hope this would be helpful to you!

Can this hold my tombow dual brush pens?

Hello Customer,We have checked it for you, it can fit them.The diameter of the tombow dualbrush pens is 10.0mm, as below shown,http://www.jetpens.com/Tombow-ABT-Dual-Brush-Pen-10-Pen-Set-Primary/pd/11256Diameter - Grip 10.0 mmDiameter - Max 10.0 mmLength - Capped 19.0 cm / 7.5 inches+++++Hope this would be helpful to you!

Will my tombow markers fit

Hello Linda,The elastic slots of the case fit the item which diameter < 10mm. +++++Hope this would be helpful to you!

YOUSHARES 120 Slots Pencil Case - PU Leather Handy Multi-layer Large Zipper Pen Bag with Handle Strap for Prismacolor Watercolor Pencils, Crayola Colored Pencils, Marco Pens and Makeup Brush (Black)

YOUSHARES 120 Slots Pencil Case - PU Leather Handy Multi-layer Large Zipper Pen Bag with Handle Strap for Prismacolor Watercolor Pencils, Crayola Colored Pencils, Marco Pens and Makeup Brush (Black)

Product ID: 289123695

🎒Removable handle strap for on-the-go ease

👜PU synthetic leather for stylish durability

🖊️127 elastic slots for ultimate organization

ASIN	B01IMQJ9LE
Brand Name	YOUSHARES
Capacity	120 Liters
Closure Type	Zipper
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (1,134)
Handle Type	Web Handle
Item Dimensions L x W x H	24.1L x 20.1W x 6.1H centimeters
Manufacturer	YOUSHARES
Manufacturer Part Number	MPN_Pencil_Case_120DK_02
Material Type	Faux leather, synthetic
Model Number	MPN_Pencil_Case_120DK_02
Number of Compartments	3
Pattern	Solid
Shell Type	Zipper
Strap Type	Detachable Leather Strap
Style Name	Travel
UPC	712809125814
Unit Count	1 Count
Wheel Type	Spinner

YOUSHARES 120 Slots Pencil Case - PU Leather Handy Multi-layer Large Zipper Pen Bag with Handle Strap for Prismacolor Watercolor Pencils, Crayola Colored Pencils, Marco Pens and Makeup Brush (Black)

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