A few customers who purchased it agreed that it was compact. A. V. Whitmore mentioned in their review of this projectors “Having played with it I wish I'd bought a more compact, higher resolution projector even though the cost is higher”. Three years ago Bibi wrote “It is compact and small 2”. Mr. Chris Jones said “Its a nice light compact machine plenty of light for a semi illuminated room” in his review of the Optoma S321.
Two people said in their reviews that the Optoma S321 was a good depth. Dp gave the Optoma S321 a rating of 99 out of 100 and said on Amazon “At 3.5 inches depth it fits easily into my laptop bag for travel”. Leo mentioned on Amazon “The luminosity is fine and color hue and depth is acceptable” in his review of this projectors but despite that rated the product 3 stars.
Some customers who reviewed the Optoma S321 considered that it was thick. Geoff Round gave the Optoma S321 a rating of 99 out of 100 and mentioned on Amazon “Works well in wide range of office lighting conditions” in their review. Leo said on Amazon four years ago “I projected with a throw of about 4.5 meters, filling my 2.5m wide screen and immediately I felt disappointed” in his review of this projectors.
Some Optoma S321 owners who reviewed it wrote that it was a good height. Bibi rated this projectors 5 stars and she wrote three years ago “There is a height adjuster at the front (one reviewer said there wasn't) - you just turn the little third leg 4” in her review of this projectors. Mr. R. V. Malin wrote “I was tempted to deduct a star for the lack of 1] a Lens cover, 2] a Quick release height adjustment foot (as on previous models”.
One Optoma S321 owner who purchased the Optoma S321 concluded that it was heavy and bulky. Victoria Jayne and she said on Amazon “It isn't too heavy and, as it is well packed in a kind of bubble wrap when it arrives, I carry it around in it's box” in her Optoma S321 review.