This is true of nearly all brands. 16oz>14oz>12oz>10oz etc for hand compartments. Bowlie the decision you needed to make was basically what kind of glove you wanted, Thai vs. Western is pretty different. A Western Twins style of glove was even recommended originally as an alternative but regardless...
TS you might find
http://www.sherdog.net/forums/75236069-post30.html useful and if you have a think about what gloves you've used before and what qualities you liked in their fit etc
Fairtex>Twins>Sandee is the consensus for quality of construction, not tried Top King but they're meant to be comparable to Twins.
Two most common Fairtex models are the BGV1 and BGV5. I've only had the BGV1 briefly so this is based on reviews I've read.
Fairtex BGV1 (usually called something just like "Fairtex Training Gloves" by retailers) =
These professional boxing gloves have a contoured design, providing a more secure and snug fit.
Engineered with the three-layers of closed foam.
Designed for the extreme versatility - use on heavybags, light bags, focus mitts, Thai pads and general pads.
Fairtex BGV5 (mostly advertised as "Super Sparring" or just "Sparring" gloves) =
Fairtex Originals with extra-wide fist for maximum protection during intense sparring
Super-contoured hand compartment for tightest fit. Extended wrist padding for increased protection against punches and kicks
Velcro wrist strap for adjustable comfort, support
Handmade in Thailand with genuine top grain leather shell and triple-layer latex foam core for heavy impact absorption
Contoured hand compartment and pre-curved thumb
The BGV5s have a softer and thicker padding than the BGV1 that is most well suited for sparring as the outermost soft layer of padding may not last as well when used on the bags for an extensive period of time. So, the BGV1s are harder and more of a multi-purpose glove suitable for either bagwork or sparring.
The BGV1s are a Thai style of glove with a shorter cuff in comparison to the BGV5 which is more of a Western glove. I'm guessing that because of this the BGV5 has better wrist support. Maybe you'd prefer the BGV1 because of greater flexibility for clinchwork. Both gloves will probably have a large hand compartment at 16oz.
The BGV1s don't have a grip bar - that little bar that goes between your fingers which you curl your first around.
For Twins they have a few different models of gloves out now, not going to recommend their regular Thai style gloves because you have girl hands and they're very wide. I've never had any of these but they're all more Western styled gloves with longer cuffs as you can see from the stock photos and I'd imagine more tightly fitting than regular Twins and probably tighter than Fairtex. They have padded palms that provide a more snug fit:
Twins BGVF:
All-leather outer with multi foam padding for optimal protection and training enhancement. Long cuff design with extra padding on inside of wrists and forearm for blocking kicks and punches. Attached thumb for protection and security. Satin nylon hand compartment liner provides extra comfort and moisture-repelling qualities while training.
Twins BGN:
• The ideal combination of power and protection for the ultimate training
• Designed for maximum shock protection
• Engineered with a tight-fit hand compartment
• Velcro wrist strap is ideal for quick wear and removal and offers superior wrist joint protection
• Handcrafted with 100% premium cowhide all-leather outer cover and special multi-foam Thai padding for optimal protection and training confidence. Adjusts to the form of your hand overtime
• Design and construction allows easy hand opening for clinch work
There's another model I wanted to post but I can't find it right now. Just from the stock pictures the BGN looks wider.
Then you have Top King. There are a few Top King models, complicated by the fact some of them have a ventilated palm. I've had a pair of King gloves which look to have a similar fit to these Top Kings:
Top King Boxing Gloves “Ultimate” (TKBGUV)
Utilize a multi-layered molded shock absorbent foam for the highest levels of workouts.
Made of Genuine Leather with a full wraparound Velcro curved cuff closure.
Really, really tight fit. Long cuff and decent wrist support. Fairly soft padding. Quite a strange design and fit of these gloves, some people will like it more than others.
Don't bother with Sandee
edit: if they let you spar with 14oz then get 14oz for the smaller hand compartments
