is this too heavy ?

TLDR
I had the exact same "is this thing the size of my phone??" panic when I started carrying a clip light, so I get why you're hesitating. The short version: phone-sized is normal for this category, and the real question is weight, not diameter. Here's the honest breakdown I wish someone had given me.
Is an iPhone-sized clip light actually too bulky for a purse?
No, not really - and this surprises most beginners. Almost every clip-on ring light in this category is roughly phone-sized. A 6-inch ring light unfolding to the footprint of your iPhone is the norm, not a red flag. What actually matters is weight and thickness once it's folded flat. Typical clip-on lights run somewhere between 100 and 300 grams. Under 150g feels like carrying a spare phone case - you forget it's there. Around 200-300g starts to feel like a genuine accessory you notice in a smaller purse. So don't judge the listing photo's diameter; look for the weight in the specs and decide if you'd tolerate carrying that every single day. Also remember: you won't be walking around with it clipped on. It lives in the bag until you need it, then clips on for ten seconds of photos.
What should I check before buying, and how much light do I actually need?
Before you click buy, run this quick checklist:
- **Battery**: at least 1-2 hours of continuous use, USB rechargeable, ideally charging while in use.
- **Brightness levels**: 3-5 steps, not just on/off. Full blast in a restaurant is usually too harsh.
- **Color temperature**: adjustable warm/cool matters more than most beginners think. Warm flatters faces at dinner; cool looks clinical.
- **Clip strength**: cheap ones skimp here. A weak spring clamp that slides off mid-shot is the #1 complaint in reviews.
- **Clip safety**: clip onto the edge of a thin case, never directly onto the screen, and keep it off the lens itself. A soft pad on the clamp jaws helps avoid scuffs.
As for how much light you need - honestly, less than you'd think, and only in specific situations. In a dim restaurant, a small clip light makes a genuine difference: warm lamplight flatters nobody's evening face, and a soft fill transforms dinner selfies. Same for shots at night or when your subject is backlit against a window. But outdoors in daylight? A ring light adds almost nothing. Don't buy it for that. If most of your shooting is daytime, something like a slim selfie light or a pocket LED panel might suit you better than a full ring.
Category-wise, you'll find plenty of options from brands like Auxiwa, Gooing and similar generic "clip-on selfie light" sellers, mostly in the $10-$25 range. That budget band buys a perfectly decent starter. Just check current reviews before committing to any specific model - including the Walmart one you linked, which I can't vouch for personally - because the common failure points are clips loosening over time, batteries draining fast, and lights that dim even at "max" brightness.
My advice: start cheap, under $20, live with it for a month, and only upgrade if you find yourself bumping against real limits.
Which kind of light would you actually carry every day?
For your use case - purse, iPhone, restaurants and occasional outdoor shots - I'd lean toward the smallest light that still handles a dim dinner table. A modest clip-on ring or a slim stick-style fill light beats the big folded ring options for daily carry, and you likely won't miss the extra output. What matters more to you right now: the flattest purse profile, or the strongest possible fill for night photos - and have you tested how heavy those rescue-kit items already make your bag feel?