There are various types of 12-port 10GbE switches in market for SMB business. This post mainly recommends several popular 10GbE switches for users.
Dell X4012 12-port 10GbE Switch Review a Half-Width Option
12-Port 10GbE SFP+ Switch Recommendation
Twelve 10G Uplink SFP ports + One console port L3 managed ethernet switch AliExpress
NEW Sub $69 Fanless 2.5GbE Switches with 10GbE
EX Series Juniper Networks US
XGS-6350-12X8TR - Layer 3 10G Switch - PLANET Technology
Sodola 8-port 2.5GbE and 1-port 10GbE Switch Review
12 Port Managed Layer 2 PoE+ 10GbE Ethernet Switch - KY-MQ0804G2
QNAP QSW-1208-8C-US 12-Port Unmanaged 10GbE Switch Twelve SFP+ with Shared Eight 10GBASE-T Ports : Electronics
Marvell 98DX8312 with 4Gb DDR3 RAM Flexible deployment with 2 x 10G Fiber Ports and 8 x 10GbE SFP+/NBASE-T combo ports technologies to support five
QNAP 12-Port 10GbE Managed Network Switch (QSW-IM1200-8C-US). Industrial-Grade Fanless, Layer 2, Web Management
10-Gigabit/Multi-Gigabit Plus - XS512EM
S3950-4T12S-R, 12-Port Ethernet L2+ Managed Switch, 12 x 10Gb SFP+, with 4 x Gigabit RJ45, Support MLAG - Europe
Can 10Gb Switch Port Link to Gigabit Switch Port?, by Sylvie Liu
Multi-Gigabit Switches for Future-Proofing Enterprise Network
QSW-1208-8C, Your first 10GbE switch