I didn't like any of the racks available via retail and none of the ones I found here were quite what I wanted so I created my own. The larger holes are 14mm and the smaller are 7mm. I have included the top and bottom pieces separately in case you want to make yours taller or shorter than mine. This was created in TinkerCAD and is easily editable there.

Best printed on its back.

Print Settings

Printer Brand:

Creality

Printer: 

Ender 3

Rafts:

No

Supports: 

Yes

Resolution:

0.2mm

Infill: 

5-10%

Filament: generic PLA any

Notes:

Minimal supports inside the end pieces if printed on its back

Category: Art Tools