There are many type of micro atx small case, you can check below list with features

IN-WIN Desktop 300W Haswell Case, Black BL631.FH300TB3F

$93.02
$74.99  in stock
13 new from $74.99
Free shipping
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • Case Type: Slim Desktop Case
  • MB Form Factor: MicroATX
  • External Bay: 5.25 x 1"; 3.5 x 1" Internal Bay: 2x 3.5", 1x 2.5"
  • Expansion Slots: 4x Low Profile Expansion Slots
  • Cooling System: 80mm Side Fan Vent ; Removable Air Filter

SilverStone Technology Home Theater Computer Case (HTPC) with Faux Aluminum Design for ATX/Micro-ATX Motherboards (SST-GD09B-USA)

$99.99  in stock
2 new from $99.99
Free shipping
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • Positive air pressure design for excellent cooling/quietness and dust-prevention
  • Support expansion cards up to 12.2". Support ATX motherboards
  • Quick access filters included
  • Incredible 358mm depth to fit comfortably inside home theater cabinet
  • Drive cages with multi-purpose mounts eliminate need for adapters.Independent graphics card vent

Thermaltake Versa H17 Black Micro ATX Mini Tower Gaming Computer Case 2.0 Edition with One 120mm Rear Fan Pre-Installed CA-1J1-00S1NN-A0

$51.99  in stock
1 new from $51.99
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as of May 22, 2020 8:23 pm

Features

  • [Elegant front panel] – Aluminum brushed like front panel provides simple elegant aesthetic
  • [Enhanced airflow] – perforated top panel heightened food stands and specially designed cable routing gap enhance airflow for better ventilation
  • [Full-length PSU cover] – special ventilated design enhances airflow and hides unsightly cables
  • [2+2 drive bay] – 2 5” x 2 + 3 5” x 2
  • One 120 millimeter rear fan pre-installed

In Win CJ712.AU265TB3 Black Micro ATX Mini Tower Computer Case 8L Small Form Factor with 265W Power Supply

$88.51  in stock
7 new from $78.00
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • 8L small form Factor efficiently Utilizes its 8L compact size to support Micro-ATX form Factor motherboard, providing flexibility for Integrators.
  • Easy integration, superior performance; optimal thermal performance
  • Smart interior structure design
  • Tool-free drive Bays and PCI-E slots
  • Standard flex ATX 265W power supply

Cooler Master Box NR400 w/ Front Mesh Ventilation, Minimal Design, Tempered Glass Side Panel and Single Headset Jack

$64.99  in stock
5 new from $64.99
Free shipping
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • Minimalistic mesh design: Elegant design elements are applied to mesh for optimal thermal performance
  • Optimal thermal performance, the full mesh front panel and ventilated top panel provide a high potential for thermal performance
  • Flush Tempered glass Side panel design:The tempered glass Side panel, fastened by thumbscrews on the rear panel, keeps the surface flush and unobstructed
  • Graphics Card support up to 346mm: Generous clearance space is provided to support the latest graphics cards
  • With/without ODD support, depending on preference, an odd version of the chassis is available; If an odd is not preferred, a cleaner appearance and more cooling options on the top and front panels are supported

Antec Value Solution Series VSK2000-U3 Micro-ATX Desktop Case, Tool-Less ODD/HDD Housing System, 2 x USB3.0, 92 mm Temperature Controlled Fan Included, 2-Year Warranty

$66.82
$59.73  in stock
7 new from $51.00
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • Motherboard Support: Up to Micro-ATX
  • 1 x 92 mm temperature-controlled fan included
  • PSU Support: TFX form factor
  • Supports up to 1 x 5. 25” ODD, 1 x 3. 5" HDD & 1 x 2. 5" SSD
  • Expansion Slots: 4

Thermaltake Level 20 VT Tempered Glass Interchangeable Panel DIY LCS Chamber Concept Micro ATX Modular Gaming Computer Case CA-1L2-00S1WN-00

$99.99  in stock
7 new from $99.99
Free shipping
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • CLEAR VIEW Four 4mm thick tempered glass panels protect the chassis while providing easy access to the components
  • COMPACT DESIGN Supporting mini ITX and Micro ATX motherboards
  • INTERCHANGEABLE PANEL DESIGN Change configuration to fit your needs with Symmetrical panels (Top, Sides and Bottom Panels)
  • COOLING with TEMPERED GLASS 1 of the 4 tempered glass panels is designed for radiator mounting that is gapped for more airflow
  • DRIVE BAYS 3 x 3.5”/2.5” with HDD Tray + 3 x 2.5” with HDD Tray

Thermaltake Core V21 SPCC Micro ATX Cube Computer Chassis CA-1D5-00S1WN-00,Black

$84.67  in stock
1 new from $84.67
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • Supports M ATX and Mini ITX Form Factor Motherboards. Motherboards 6.7” x 6.7” (Mini ITX) , 9.6” x 9.6” (Micro ATX)
  • Designed for use in either a vertical or horizontal orientation on the motherboard
  • Chamber Concept Design with optimized Cable management space for Small Form Factor Builds
  • Stackable and Flexible Thermal Solution. Remarkable Expansion. Advance Ventilation
  • 2x USB 3.0, 1x Headphone, 1x Mic Front Ports, Internal Bay: 3x 3.5 inches or 2.5 inches

CORSAIR Crystal 280X RGB Micro-ATX Case, 2 RGB Fans, Lighting Node PRO Included, Tempered Glass - White

$188.06  in stock
7 new from $149.00
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as of May 22, 2020 8:23 pm

Features

  • Massive cooling potential with room for up to six 120mm cooling fans, or a 240mm radiator in the top, 240mm radiator in the front, and 240mm radiator in the bottom
  • Two included CORSAIR LL120 RGB fans boast a total of 32 individually customizable LEDs, controlled by an included Lighting Node PRO digital RGB lighting controller and CORSAIR iCUE software to deliver a symphony of color
  • Three stunning tempered glass panels put your system on display like no other Micro-ATX case. Compatible Corsair Liquid Coolers - H55, H60, H75, H80i, H90, H100i, H105, H110i, H115i
  • A dual-chamber layout highlights your PC's core components, whilst tidying cables, drives and the PSU into a dedicated rear chamber
  • Dedicated storage compartment for up to two 3.5" drives and three 2.5" drives keeps your system clean without sacrificing storage capacity

Rosewill TYRFING ATX Mid Tower Gaming PC Computer Case with 2 Pre-Installed

$34.99  in stock
2 new from $34.99
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Amazon.com
as of May 22, 2020 8:23 pm

Features

  • Sleek design suitable for elegant gaming and office style systems; compact and sturdy steel/plastic construction for lasting performance
  • Spacious interior with four expansion slots, one internal 3.5" drive bay and three internal 2.5" drive bays; supports a microATX or mini ITX motherboard
  • Great cable management for clean and simple PC builds
  • Excellent airflow from one pre-installed 120mm fan in rear; supports two additional 120mm fans in front and two on top, or one 240mm radiator on top