YJ MGC Sigma 3x3

The YJ MGC Sigma is what the Beta was trying to be.

Larger core magnets lock the cube into place with smoother alignment.
Lighter corner-edge magnets create balance without hesitation.
Sharper corner caps reduce unwanted twists at the source.

Finished with red accents and a new insignia.

“I have examined many cubes. This one passes.”
- Socrates

Not completely satisfied with this product? We accept returns within 4 weeks (28 days) past the delivery date, for either store credit, or a full refund to the payment method — the choice is yours.

Click to see exclusions and more details on our returns policy

All of our products are guaranteed to be free of defects, or we will replace and reship at no cost to you. Please contact us within 4 weeks (28 days) past the delivery date to report any issues with items you have purchased.

Please note that some new cubes when being used for the first few times may experience what is termed a "pop". This is when one or more parts of a puzzle pop out without any damage actually being done to any of the pieces. This also occurs from time to time during normal usage. Pops are typically not considered a defect if the parts which come off can be reassembled by hand.

The corners on 2x2 puzzles should not be twisted as doing so may snap the piece. Damage caused by corner twisting is not considered to be a defect.

• Free Standard Shipping is offered with orders exceeding $60. Standard Shipping is defined as shipping that is expected to take 3-6 business days to arrive at its destination (continental US only).
• Free Expedited Shipping is offered with orders exceeding $90. Expedited Shipping is defined as shipping that is expected to take 1-3 business days to arrive at its destination (continental US only).
• To claim, please select the applicable shipping option during checkout to redeem this offer on a qualifying order.
• Please be advised that for free shipping, we may use USPS or UPS, and no specific shipping method is guaranteed. We will pick a method that aims to deliver within the specified timespan. If either of these carriers cannot deliver to your address, or if you want a specific mail class, please make sure to select a different service.
• Furthermore, delays are possible due to extreme weather and other circumstances that are outside of our control.
• For addresses outside of the continental US (Hawaii, Alaska, Puerto Rico, US Territories, and APO, FPO, DPO), delivery timelines can be unpredictable sometimes. The estimated timelines may not necessarily apply for these destinations.
• All orders are shipped from our New York warehouse.
• Orders are shipped the same business day they are placed, or the next business day. The cutoff for same day shipping is 3PM EST.
• There is no processing/handling surcharge — all our shipping rates are at rock-bottom.

• Please be advised that we do not ship any items duty paid, and we do not charge VAT or taxes at the time of purchase. This means that depending on your country's import policies, you may be required to pay an additional import or customs fee to receive your order. This is separate from the shipping fee and is paid directly to your country, not to us. We recommend that before ordering, you do some research to see what fees if any would be requested from you so that it does not come as a surprise.

Click to learn more about our shipping methods